Removed `Android.mk` and `Application.mk`, allowing `CMake` to run directly from the build.gradle file. Users no longer need to check out `NDK` or depend on it, simplifying the usage of the Flac extension.
Also fixed a copy-pasted comment in `CMakeLists.txt` of Opus and IAMF.
PiperOrigin-RevId: 684769561
Many usages are needed to support other deprecations and some
can be replaced by the recommended direct alternative.
Also replace links to deprecated/redirected dev site
PiperOrigin-RevId: 601795998
As most classes are used via interface only and people depending on it locally can always find the Javadoc in Android Studio directly, we don't plan to add Javadocs for these extensions module in developer.android.com.
PiperOrigin-RevId: 521993756
Also fixed the javadoc link in devsite and removed javadoc links from decoder extensions as it is not published yet on developer.android.com.
#minor-release
PiperOrigin-RevId: 520636868
