Inject message-posting stacktrace as a cause of exception

... if we detect an exception from a looper thread.

Bug: 292141694
Flag: TEST_ONLY
Test: $ANDROID_BUILD_TOP/frameworks/base/ravenwood/scripts/run-ravenwood-tests.sh -r
Change-Id: I3b4314488d603b1c294d26b0f4804e7d8cc96827