Load internal resources using name rather than ID

Since setup wizard is distributed by binary, and internal framework
resource IDs may shift due to OEM customizations, load the resource
via its name instead.
Long term SUW should move away from depeneding on framework internal
resources or be open sourced.

Test: Existing tests pass
Bug: 63546650
Change-Id: I3555945d1f310ee79bdfc3542411d46a4fd4bf7d