Changed AAPT2 to abide by AAPT resource whitespace triming.

Bug: b/74331008
Test: Created tests in ResourceParser_test.cpp
Change-Id: Id7b387692b795774cd77452ca8cf06a8447bf3be
(cherry picked from commit a04880771254f5169a1fe460ff40b565d9dceb0d)
2 files changed