Block the content scheme intent in AccountTypePreferenceLoader

Bug: 366401629
Flag: EXEMPT security fix
Test: atest AccountTypePreferenceLoaderTest, manual
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:841fb3846b25dee4ae5924fd798cd48709c69801)
Merged-In: Ica87087341cc983df04190919e33dc369fa18619
Change-Id: Ica87087341cc983df04190919e33dc369fa18619
2 files changed