Update Flag delegates to handle framework JarJar

The Android framework build jarjars all the flag classes, adding
com.android.internal.hidden_from_bootclasspath to their package. This
updates the Flag_Delegate classes accordingly.

Flag: NONE host-only change
Bug: 381394200
Test: layoutlib tests
Change-Id: Ie22ab41f01a6d0b7349b97a2ec8b7e471c9bcf98
3 files changed