bp2build java_libraries depend on Android SDK

Soong adds an implicit dependency on the Android SDK for all
java_libraries (and related modules). This feature becomes apparent
after converting arch-variant srcs for android_apps, so we should suport
this for now. Eventually, we will want to replace this forced dependency
with a Bazel toolchain workaround.

Test: build/bazel/ci/bp2build.sh
Change-Id: Ic28e8c7690f69294b4bdcb9bb78a6f1f031fe97e