[CTS] Remove runtime permission granting in profile tests

Remove permission granting in installPackageAsUser calls as none of
the profile tests install apps that require runtime permissions and
it adds an additional dependence that causes flakiness.

Bug: 123978141
Test: atest $(find \
cts/hostsidetests/backup/src/android/cts/backup \
-name 'Profile*')

Change-Id: Iadf0c3628c69dbda9131096b6292dce78162abc1
3 files changed