Fixed: Some EPUB files are not downloading.

[MohitMaliFtechiz]

Fixes #3737
Fixes #3453

• The issue was epub fileName containing the colon ":" in it, that is not supported by most of the fileSystem, that's why it was not creating the file in fileSystem and we were not able to download the epub file.
• So to fix this we have improved our getDecodedFileName method which returns the fileName of the epub file, here we are removing the colon from fileName if any contains. For this change, we have added the test cases as well for our getDecodedFileName function to test it properly.
• We also refined our downloadFileFromUrl method. Previously, the generateSequence function was used to create new files with underscores and incremented numbers, anticipating multiple attempts to save the same file. However, since we now save files only once in our storage, this feature is no longer utilized. This enhancement is detailed in issue Fix same picture and pdf saved multiple times #2879.
• Added epub query in our manifest to properly open epub files in the external application.

Before Fix	After Fix
EPubNotOpening.mp4	EPUBOpeningIssueFixed.mp4

• This PR is related to the epub not downloading and we have one more ticket like this Can't open EPUB from Project Gutenberg in external app #3453, in this ticket, we have added the query in our manifest which fix the Can't open EPUB from Project Gutenberg in external app #3453. One thing is requested in that PR by @kelson42 Fixed can't open epub in external app #3455 (comment). So I have implemented that in this PR. I have added a title and message for this dialog, if you have any better suggestions for this it would be welcome.

screen-20240606-142648.mp4

[codecov]

Codecov Report

Attention: Patch coverage is 17.24138% with 48 lines in your changes missing coverage. Please review.

Project coverage is 53.78%. Comparing base (94feb77) to head (da88313).
Report is 21 commits behind head on main.

❗ Current head da88313 differs from pull request most recent head 13fb613

Please upload reports for the commit 13fb613 to get more accurate results.

Files	Patch %	Lines
...le/core/utils/dialog/UnsupportedMimeTypeHandler.kt	14.63%	35 Missing ⚠️
...kiwix/kiwixmobile/core/utils/dialog/KiwixDialog.kt	0.00%	6 Missing ⚠️
.../kiwix/kiwixmobile/core/main/CoreReaderFragment.kt	0.00%	3 Missing ⚠️
...g/kiwix/kiwixmobile/core/main/CoreWebViewClient.kt	50.00%	2 Missing ⚠️
...rg/kiwix/kiwixmobile/core/utils/files/FileUtils.kt	33.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3738      +/-   ##
============================================
- Coverage     53.86%   53.78%   -0.08%     
- Complexity     1376     1377       +1     
============================================
  Files           298      299       +1     
  Lines         11308    11333      +25     
  Branches       1495     1495              
============================================
+ Hits           6091     6096       +5     
- Misses         4226     4246      +20     
  Partials        991      991              

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[Sagar0-0]

If any EPUB reader is not present in the device(which is not in most devices by default), then where the Open button will navigate, or what will it popup?

[MohitMaliFtechiz]

@Sagar0-0 It will show the toast error message if no PDF/Epub Reader application is installed on the mobile device.

kiwix-android/core/src/main/java/org/kiwix/kiwixmobile/core/utils/dialog/DownloadOrOpenEpubAndPdfHandler.kt

Line 83 in 29c7faa

activity.toast(R.string.no_reader_application_installed)

[kelson42]

@MohitMaliDeveloper CI Failed again!!!

[kelson42]

@MohitMaliDeveloper CI Failed again!!!

[MohitMaliFtechiz]

@kelson42 CI looks stable after merging #3785. CI is green on this PR #3785 as well as on the main branch. Also, CI is green in #3788.