android: Build binaries, add to git.

Following RN's instructions [1].

To build them, we used the recommended Docker command:

```
docker run --rm --name rn-build -v $PWD:/pwd -w /pwd \
    reactnativecommunity/react-native-android /bin/sh -c \
    "./gradlew installArchives"
```

We might have chosen to put the binaries in Maven instead of in the
repository, but that seemed unnecessarily complicated [2].

[1] https://github.com/facebook/react-native/wiki/Building-from-source#publish-your-own-version-of-react-native
[2] https://chat.zulip.org/#narrow/stream/243-mobile-team/topic/.60react-native.60.20fork/near/984529

.gitignore

@@ -44,7 +44,9 @@ buck-out
 .gradle
 local.properties
 *.iml
-/android/
+# Not ignoring /android/ allows our fork to be a working dependency
+# (https://github.com/facebook/react-native/wiki/Building-from-source#publishing-to-a-git-fork-dependency)
+# /android/
 
 # Node
 node_modules

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5-javadoc.jar.md5

@@ -0,0 +1 @@
+b4a50e88c4cafb0680ed42a91156f651

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5-javadoc.jar.sha1

@@ -0,0 +1 @@
+f6f236d31d8e2bb22961109023579dde4a6fdf0c

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5-sources.jar.md5

@@ -0,0 +1 @@
+672da7aa1dec30a2fe89b193849cf19f

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5-sources.jar.sha1

@@ -0,0 +1 @@
+d21098c434fd78030c32c90359848fed9a14985c

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5.aar.md5

@@ -0,0 +1 @@
+d5cfce81157092c7c55c029b68718d6e

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5.aar.sha1

@@ -0,0 +1 @@
+e368e7a989b90a9e129918938608e71a8fc410dc

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5.pom

@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.facebook.react</groupId>
+  <artifactId>react-native</artifactId>
+  <version>0.61.5</version>
+  <packaging>aar</packaging>
+  <name>ReactNative</name>
+  <description>A framework for building native apps with React</description>
+  <url>https://github.com/facebook/react-native</url>
+  <licenses>
+    <license>
+      <name>MIT License</name>
+      <url>https://github.com/facebook/react-native/blob/master/LICENSE</url>
+      <distribution>repo</distribution>
+    </license>
+  </licenses>
+  <developers>
+    <developer>
+      <id>facebook</id>
+      <name>Facebook</name>
+    </developer>
+  </developers>
+  <scm>
+    <connection>scm:git:https://github.com/facebook/react-native.git</connection>
+    <developerConnection>scm:git:git@github.com:facebook/react-native.git</developerConnection>
+    <url>https://github.com/facebook/react-native.git</url>
+  </scm>
+  <dependencies>
+    <dependency>
+      <groupId>com.facebook.infer.annotation</groupId>
+      <artifactId>infer-annotation</artifactId>
+      <version>0.11.2</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>javax.inject</groupId>
+      <artifactId>javax.inject</artifactId>
+      <version>1</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>androidx.appcompat</groupId>
+      <artifactId>appcompat</artifactId>
+      <version>1.0.2</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.facebook.fresco</groupId>
+      <artifactId>fresco</artifactId>
+      <version>2.0.0</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.facebook.fresco</groupId>
+      <artifactId>imagepipeline-okhttp3</artifactId>
+      <version>2.0.0</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.facebook.soloader</groupId>
+      <artifactId>soloader</artifactId>
+      <version>0.6.0</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.google.code.findbugs</groupId>
+      <artifactId>jsr305</artifactId>
+      <version>3.0.2</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.squareup.okhttp3</groupId>
+      <artifactId>okhttp</artifactId>
+      <version>3.12.1</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.squareup.okhttp3</groupId>
+      <artifactId>okhttp-urlconnection</artifactId>
+      <version>3.12.1</version>
+      <scope>compile</scope>
+    </dependency>
+    <dependency>
+      <groupId>com.squareup.okio</groupId>
+      <artifactId>okio</artifactId>
+      <version>1.15.0</version>
+      <scope>compile</scope>
+    </dependency>
+  </dependencies>
+</project>

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5.pom.md5

@@ -0,0 +1 @@
+d773081803ace0462fc69253c3c251b3

android/com/facebook/react/react-native/0.61.5/react-native-0.61.5.pom.sha1

@@ -0,0 +1 @@
+42dccae2647b050b57e05e41e2bec898927aeb37

android/com/facebook/react/react-native/maven-metadata.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<metadata>
+  <groupId>com.facebook.react</groupId>
+  <artifactId>react-native</artifactId>
+  <versioning>
+    <release>0.61.5</release>
+    <versions>
+      <version>0.61.5</version>
+    </versions>
+    <lastUpdated>20200825180753</lastUpdated>
+  </versioning>
+</metadata>

android/com/facebook/react/react-native/maven-metadata.xml.md5

@@ -0,0 +1 @@
+aa57f1b2f064dca23b4b122f2715a941

android/com/facebook/react/react-native/maven-metadata.xml.sha1

@@ -0,0 +1 @@
+3a98ee4afadae726bc5c9805698318f8897bbfca