AAPT2: Fix long version code bugs

Refactoring areas in AAPT2 that use android:versionCode to also use
abdroid:versionCodeMajor. Does not add versionCodeMajor command line flag yet.

Bug: 109883459
Test: aapt2_tests
Change-Id: I573fbea37491cf8c5742f9e385c66ee64c4e5166