libbt: Add btlock support

 * Concurrent WiFi/BT firmware loading can cause a chip crash.
 * Kernel supports a btlock device which is a simple semaphore that can
   protect from this situation.
 * Add support in the Bluedroid vendor lib for this on the BT side, as
   WiFi is already done directly in the kernel.

Change-Id: I8b9d3b1ccd06cc5d5528c7d6d685048c258d9887
3 files changed
tree: d591c94e20395c57eeb85d6cc8ab7abaea46ff85
  1. include/
  2. src/
  3. Android.mk
  4. gen-buildcfg.sh
  5. METADATA
  6. OWNERS
  7. vnd_buildcfg.mk