Revert "Exempt prebuilts/jdk and build/bazel/examples/java BUILD..."

Revert submission 1789607-java_android_ci

Reason for revert: doesn't work with lunch
Reverted Changes:
I6f82e4984:Exempt prebuilts/jdk and build/bazel/examples/java...
I75a61c24c:Define a java_runtime and toolchain bazel targets ...
I0f107d334:Add a java binary, a java library, and an android ...

Change-Id: I9869424dd44c03b33ac02ab38e4a3e0deee9eb07