Flag --incompatible_disable_native_android_rules will break Android Testing in Bazel 1.2.1

Incompatible flag --incompatible_disable_native_android_rules will break Android Testing once Bazel 1.2.1 is released.

Please see the following CI builds for more information:

* [:windows: (OpenJDK 8)](:windows: (OpenJDK 8))
* [:ubuntu: 18.04 (OpenJDK 11)](:ubuntu: 18.04 (OpenJDK 11))
* [:darwin: (OpenJDK 8)](:darwin: (OpenJDK 8))
* [:ubuntu: 16.04 (OpenJDK 8)](:ubuntu: 16.04 (OpenJDK 8))

Questions? Please file an issue in https://github.com/bazelbuild/continuous-integration

**Important**: Please do NOT modify the issue title since that might break our tools.

No repository file or test is identified in the issue. Start with the four linked CI builds and the --incompatible_disable_native_android_rules flag, then locate the affected Android testing setup and verify it against Bazel 1.2.1.

Written by the indexing model from the issue text.