AAPT2: always say which file failed to compile

Sometimes AAPT2 doesn't include the path of the file in the error
message, or just outputs a warning where an error should be printed
(but the overall build still fails without an error message). Let's
always include the file path to make it easier for the users to find out
the source of the failure.

Fixes: 122856772
Test: manual
Change-Id: Ibbbfd21b372792e5eaa40278186eb64cdfb0f60e