Merge "Import sources from xalan-tests xalan-j_2_7_3-rc10" am: 52bcda7324 am: 4ff52b81bf am: 9ac7a37dc9

Original change: https://android-review.googlesource.com/c/platform/external/apache-xml/+/2643660

Change-Id: I4deda778c0c57f115aeca3381d04a655442fca25
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>