Fixing the crash when tapping the "Downloaded apps" in Accessibility page.

Root cause:
When Accessibility settings parse the application which is from google
play store, the settings have no check if the resource is valid before
delivery the parameter into the corresponding fragment.

Solution:
Check if the resource is valid before creating the image uri.

Bug: 190716289
Test: manual test
Change-Id: I56eba2232ddf6ed5b2e526d4698479465a012e52