SF: Trigger ANR when buffer cache is full

* Updates the transaction queue stall listener to take a string that
  contains the reason for hanging.
* Updates ClientCache::add to indicate whether or not a failure is due
  to the cache being full
* Calls the transaction queue stall listener when the ClientCache is
  full

Bug: 244218818
Test: presubmits
Change-Id: I5fdc9aef0f0a1601ace1c42cfac5024c3de8d299