Convert gensrcs to java_library to deprecate depfile am: 0d62f886 am: c5918bff am: 2ab64c52

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/18930290



Change-Id: I70f1e233410e1758dbc1a2b42819dc954244eea8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>