Add PackageInstaller#uninstallExistingPackage API to TvSystem

To be used for profile management applications.
Forwards calls to the hidden system API.

Bug: 149465312
Test: m
Change-Id: I3148a46fe89756b8800bccf2e78c3ae4be5fca5f
3 files changed
tree: c45e98e7f8b8888658a589b1ac4e808862e2cf8a
  1. Android.bp
  2. api/
  3. java/