Android package names are more strict (ASCII only) than Java package names. Also fixed an issue where trailing underscores were disallowed in Android package names. Bug: 68468089 Test: make aapt2_tests Merged-In: I1052e9e82b6617db6065ce448d9bf7972bb68d59 Change-Id: I1052e9e82b6617db6065ce448d9bf7972bb68d59