Propagate <uses-library> dependencies from `android_library` to apps.

Automatically add `uses_libs`/`optional_uses_libs` properties specified
in `android_library` modules to the apps that transitively depend on
these libraries.

Note that a library may choose to specify its <uses-library> deps as
either optional or required. If this is not the right choice for an app,
it should be able to override it by specifying its own `uses_libs`/
`optional_uses_libs` properties.

Bug: 196377222
Test: lunch aosp_cf_x86_64_phone-userdebug && m
Change-Id: I1e36c56719c0023dcd25fa6aeb92016471702b9f