AAPT2: Better error messages for ManifestFixer

AAPT2 will now print the XML hierarchy where it found an unexpected
element.

Test: make aapt2_tests
Change-Id: Iac7918b2f344fab874f0a3e7aa9c6936ecde8913
Merged-In: Iac7918b2f344fab874f0a3e7aa9c6936ecde8913
(cherry picked from commit ed37f4842ad838792b16bf19768ed9b2519b0194)
3 files changed