Removes package.html files and update package-info.java files to
use same wording as previous releases.
Bug: 35653948
Test: make docs
Change-Id: Idbede2eb4f57818f152834fad7e75dd181fe25d6
The android.test.runner target forms part of the Android API and
so must maintain backwards compatibility. The junit classes that
belong in there are copied here to ensure that they do not
change when external/junit is upgraded.
Bug: 30188076
Test: make checkbuild and checked android.test.runner contents
Change-Id: I947144c47ae1c3eb361a43c39bdd03dc11b9575f