Remove improper LOCAL_AIDL_INCLUDES

This is inteneded to be a list of directories (from the root of the
source dir), not a list of relative aidl files from the
packages/apps/Dialer directory. Since this isn't doing anything useful
right now, just remove it.

Test: treehugger
Change-Id: Ib99296e5dbeaeec92a7568bb8b0b5cfc1154974e