[Do Not Merge] Ignore malformed shortcuts

After an app publishes a shortcut that contains malformed intent, the
system can be stuck in boot-loop due to uncaught exception caused by
parsing the malformed intent.

This CL ignores that particular malformed entry. Since shortcuts are
constantly writes back into the xml from system memory, the malformed
entry will be removed from the xml the next time system persists
shortcuts from memory to file system.

Bug: 246540168
Change-Id: Ibbfd0891eabdce72f76571798382fe949d8f453d
Test: manual
(cherry picked from commit 36338a31)