Flag --incompatible_load_java_rules_from_bzl will break Android Testing in Bazel 1.2.1

Incompatible flag --incompatible_load_java_rules_from_bzl 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 named. Start by reviewing the linked CI builds and locating the Android testing sample that fails with --incompatible_load_java_rules_from_bzl; done means confirming the affected sample works with the Bazel 1.2.1 compatibility change.

Written by the indexing model from the issue text.