allow setting opengles property

Addresses:
avc:  denied  { set } for property=ro.opengles.version
scontext=u:r:qemu_props:s0 tcontext=u:object_r:opengles_prop:s0
tclass=property_service

Test: build
Change-Id: Ia7445344726b941ad153a126dfe66df4bc8536ab