[Sb refactor] Remove some unused fields from MobileIconInteractor am: 376a02bdb2 am: 582c9ef686

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24394059

Change-Id: Ic507042c02645930cf8ef390586130810385e08b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>