am a65a16a2: Add RIL_REQUEST_SHUTDOWN to notify RIL that device is shutting down

* commit 'a65a16a2e81b11762fd9e4233e1a212effcfee82':
  Add RIL_REQUEST_SHUTDOWN to notify RIL that device is shutting down
tree: 2193567b4291928f6bf16db47487414ac9c64f56
  1. include/
  2. libril/
  3. librilutils/
  4. reference-ril/
  5. rild/
  6. CleanSpec.mk