Allow owners of ACCESS_SHORTCUTS pin shortcuts on behalf of other apps

Test: atest com.android.server.pm.ShortcutManagerTest1 \
            com.android.server.pm.ShortcutManagerTest2 \
            com.android.server.pm.ShortcutManagerTest3 \
            com.android.server.pm.ShortcutManagerTest4 \
            com.android.server.pm.ShortcutManagerTest5 \
            com.android.server.pm.ShortcutManagerTest6 \
            com.android.server.pm.ShortcutManagerTest7 \
            com.android.server.pm.ShortcutManagerTest8 \
            com.android.server.pm.ShortcutManagerTest9 \
            com.android.server.pm.ShortcutManagerTest10
Bug: 148560664

Change-Id: I77f13d590dada20169ccf53a6fc4684ac25c77ea