Added a cache management system for pre-processed PNG files
along with unit tests. The cache system will be used if
the --no-crunch flag is passed to AAPT during the package
phase. The cache can be updated by a call to 'aapt crunch'
(see usage statement). Also put in benchmarking code.
Change-Id: I58271fb2ee2f5f9075fd74d4ff6f15e7afabd05c
When you have too many rows and columns, there are not enough colors in
the 9-patch private metadata to represent them. Instead of crashing
aapt, this change gives the user an error message telling them why it's
invalid.
Change-Id: I5e7bd59472a3a2eafa7cbc263792458cce2b5594
