Revert "Support installation of the new app source certificate"

We decided to punt extra certificate to post-R.

This reverts commit c8a1960cf4aaab46f26dc3f872710a9aa64666d3.

Test: Treehugger
Bug: 112038744
Change-Id: Ic53e58944faebe7aa427975ebd77ce783bdddaf2
13 files changed