Check if ANGLE is installed before running tests am: 9d31282191 am: 38ab2d7d54 am: df3ea1f27a

Original change: https://googleplex-android-review.googlesource.com/c/platform/cts/+/15960599

Change-Id: I76a7a568c524f9a32ed28a2103272db97ff73a75