Showing Toast message when the target package is null for the disabled shortcut

The shortcut for a certain set of apps could have their component names set to null. In this case, if we still need the package name for the shortcut, we should use the package name from the intent, which is accomplished in getTargetPackage. Additionally, if the target package is still null, we are falling back to showing the Toast messages only.

Fix: 239685630
Test: Verified that the crash no longer happens after clicking on grayed out shortcuts
Change-Id: I4de68ea1a227032e16e5c00407f75159a7aba30f