Update list preference layout to more closely match Material spec
Update list preference layout to more closely match Material spec

Expects icons to have 4dp of padding baked in, which is consistent with
existing icons.

BUG: 17235037
Change-Id: Ic855664e85454be5e0de030070eb6ab1594e2448

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base