Changes Hub quick picker to get current wallpaper from preferences am: a0eb054ffd

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/22160507

Change-Id: I2288f55e7cc0929e3ec17503a2ba2e6a90410d65
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>