Binder caches for Bluetooth

* A cache for isOffloadedFilteringSupported().

* A cache for getProfileConnectionState().

Bug: 140788621

Test: A special build that puts the PropertyInvalidatedCache in
verification mode was loaded on the device.  Then one iteration of MPTS
was executed.  No cache inconsistencies were found and no SELinux
violations (associated with the binder cache) were found.  The number of
cache misses was approximately 15% of the total binder calls.  A second
test was run in which bluetooth headphones were connected and
disconnected.  Then bluetooth itself was disabled and then enabled.  The
caches were invalidated as expected and no errors were uncovered.

Change-Id: I6b939b37663b81894dd1c23a33758910580159fe