Prevent frozenBinderTransactionDetected() storm

Although system_server is never frozen, its async binder buffer might
still be exhausted in some extreme conditions. In such a case, this
async call itself would fail, triggering endless loop. Throttle this
callback function to fix it.

Bug: 336171553
Bug: 333508040
Bug: 328423444
Test: frozenBinderTransactionDetected is throttled
Change-Id: Ibe475f7f9699921a1555ab937e5f67ddcf502f58