Support ANGLE unittests on Android
Support ANGLE unittests on Android

As we use ANGLE on Android, this CL adds ANGLE unittests to Android so
that some issues can be caught at an earlier stage.

BUG=534814

Review URL: https://codereview.chromium.org/1363773003

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#353005}

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