Add fallBackToDefaultHolder="true" for pregrant roles.

These roles are meant to be read-only and initialized by the config, so to handle cases like PC update happens before platform update, we should enable fallBackToDefaultHolder, similar to what we did for the SYSTEM_GALLERY role.

fixes: 185445107
Test: presubmit
Change-Id: Ie3fec1a7698807d98fd760fdafdb3887fe3fa1d7
2 files changed