Merge "Revert "Migrate contexts tests to Android.bp"" am: 8bd664ba28 am: b9e7afda53 am: 24c0c93ae6 am: c6c7a7ff70

Original change: https://android-review.googlesource.com/c/platform/system/sepolicy/+/1949061

Change-Id: Id7a02638043fb3ea7250d21b42b4a406f220a1c4