Android: Fixes for Q and R

Android: Fixes for Q and R

Fix Android-Q build:
- Use AOSP prebuilt bison by specifying $(BISON) variable
- Use AOSP prebuilt flex by specifying $(LEX) variable

Fix Android-R build:
- Add M4 environmet variable for Android R and higher (See [1])

[1] - https://cs.android.com/android/_/android/platform/build/+/2bfffb9f48a78de12faf5da77424c0cecb70d6eb:Changes.md;dlc=997661002af1282d938e88c3c723037e42e5d283

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Reviewed-by: Eric Engestrom <eric@engestrom.ch>
Tested-by: Mauro Rossi <issor.oruam@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5894>