Prevent Sharing when FRP enforcement is in effect

ADB command to trigger sharing:

```
adb shell 'am start -a android.intent.action.CHOOSER --eu android.intent.extra.INTENT "intent:#Intent;action=android.intent.action.SEND;type=text/plain;S.android.intent.extra.TEXT=Shared%20text;end"'
```

Bug: 327645387
Test: manual; trigger FRP; attempt to open share sheet using adb
Change-Id: I1db78ab74babe71b516f601be35cf476b5e43271
Merged-In: I928b6ea68aa8d6d710dc51eb70acd2cc2ec682c3
Merged-In: I4116ecbd3534b0391a5b468ed4cd18f2d4b3ae0a