This is necessary because otherwise those are included in several gradle projects. Gradle doesn't support the same files imported in different projects, and it removes them from a random one if it happens, resulting in missing symbols.
This extracts the shared files in a new target, and adds it as dep of the original target.
Test: Build launcher + execute a few tests manually with gradle + verify that Launcher.java can resolve all symbols with gradle config
Bug: 262267728
Change-Id: Ida5b25c45320d517603834112f4699e4d3344c03
This will help SysUI test team (who uses TAPL) to set up Gradle build for their tests.
Bug: 202567877, 234414088
Test: presubmit
Change-Id: I3d923ea4b54d1a4c3d2b345be09692727d30433e
