When an app specifies (or imports) resources with various
configurations for different SDK versions, specifying
a minSdk will make many of those resources unreachable.
Version collapsing will prune out the resources specified
for SDK versions less than the minSdk.
If, however, there is no exact matching resource for the
minSdk version, the next smallest SDK version is kept.
Change-Id: Ic7bcab6c59d65c97c67c8767358abb57cdec60a4
Adds the diff command and various small fixes to issues
discovered when diffing old AAPT built APKs with new AAPT2
built APKS.
Bug:22775504
Change-Id: I682a7fe1cf4b3efa7cbd5d18b333cf2d1046fe1b
