BuildConfig: Deprecate APPLICATION_ID

[Serlopsal]

https://android.googlesource.com/platform/tools/base/+/51644d6f302ea8c3616d98afde0b4ee30d7d4741

BuildConfig: Deprecate APPLICATION_ID in libraries.

It is at best misleading, so it is marked as deprecated and replaced by
LIBRARY_PACKAGE_NAME.

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[Serlopsal]

@googlebot I signed it!