Move xmlparser to under libstagefright

Test: make cts -j123 && cts-tradefed run cts-dev --module \
CtsMediaTestCases --compatibility:module-arg \
CtsMediaTestCases:include-annotation:\
android.platform.test.annotations.RequiresDevice

Bug: 37657124
Change-Id: Ib78f983635586558b99850b2fd54143b0a418d1d
11 files changed