Fix-build : Do not build bluedroid for 64 bit targets.

This code is not 64 bit safe. In particular, it attempts
to cast pointer types to UINT32 in several places. For now,
build it as a 32 bit library. A 64 bit variant will not be
needed if libbluetooth_jni is also build for 32 bit only.

Change-Id: Ic5f86bd2823083cacf21a852d1c13b4796a7e125
6 files changed