Bluetooth: Force BluetoothExt to 32-bit

Force BluetoothExt module to 32-bit only,
and specify the libbluetooth_jni library
as a library dependency.

Change-Id: I2cf06bd7a66fec5daa5caae9030c4f3291171fdd
CRs-Fixed: 765868
Merge "Bluetooth: Force BluetoothExt to 32-bit"
Merge pull request #2 from AOSParadox/LA.BF.1.1.2_rb1.7

CAF UPDATE : LA.BF.1.1.2_rb1.7