Themes: Track NotFoundException on app launch failure

We should probably keep an eye on NotFoundExceptions too since they
are a common exception thrown when a bad theme is applied.

Change-Id: I2ccaed0349a90ab99b99fb83cef0c9183d598088
Merge "Themes: Track NotFoundException on app launch failure" into du44
Merge remote-tracking branch 'upstream/du44' into du44