Remove references to non-existent directories

Fixes warnings during makefile parsing:
FindEmulator: find: `frameworks/opt/bluetooth/src/android/bluetooth/client/pbap': No such file or directory

Test: builds
Change-Id: Ib925da33eca52cb4fe4cfce5e227a4d9894c3315
1 file changed
tree: af13802a6c5997851e28e802cdc588c8147dd9bd
  1. Android.mk
  2. src/