Resolve XML parser used in tests.

We recently pivoted the default XML parser to write a new binary
XML schema, which requires all users to "resolve" to determine the
correct parser.

Bug: 176058231
Test: atest FrameworksMockingServicesTests:AppOpsUpgradeTest
Change-Id: I9de15ee359d8290b81e2029d7c30eac39a1781b9
1 file changed