adbd: allow reading apk_data_file

avc: denied { search } for comm=73657276696365203139 name="app" dev="sda35" ino=770049 scontext=u:r:adbd:s0 tcontext=u:object_r:apk_data_file:s0 tclass=dir permissive=0

Bug: 30000600
Change-Id: I86958ebcca815ee1779f85fb425592493f40101a