Add caller check to

* Only the Car Settings app can reset credentials
* should still be
  callable by CertInstaller.

Manual testing steps:
* Install certificate via Settings
* Verify unable to reset certificates via test app
  provided in the bug (app-debug.apk)
* Verify able to reset certificates via Settings
* Verify isn't changed

Bug: 200164168
Test: manual
Change-Id: Ibf6a02a35beed08c769fda9b3044d2e7933186dd
(cherry picked from commit f366a7f52cee0a50c1f672158c4a70d007b61cae)
1 file changed
tree: 3d64717f52d4a614ed4fe836da4026b65c66a894
  1. res/
  2. src/
  3. tests/
  4. Android.bp
  5. AndroidManifest.xml
  7. PREUPLOAD.cfg