Add support to Ant for packaging dependency checks

This change adds in support for making aapt generate a dependency
file for the .ap_ package generated during resource packaging. Ant
will then check this dependency file before calling aapt again and
will only repackage resources if the dependencies have been modified
in some way.

Change-Id: I56462163c5dd064c1416bc43913f044df8ee9be1
1 file changed