Add setPackage() to the intent to improve safety

* Also remove setFlags() which is already handled by ActivityStarter

Bug: 400057323
Test: atest HearingDevicesDialogDelegateTest HearingDevicesDialogDelegateTest
Flag: EXEMPT bugfix
Change-Id: I1819e7284a83ef6d6dff68bd3464226270f4c733
4 files changed