Allow kernel sdcard read access as well for MTP sync.

Change-Id: I004ae9aee23a28cb4975fcee51d24eb1a654f0b7
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

kernel.te

@@ -35,7 +35,7 @@ dontaudit kernel self:security setenforce;
 allow kernel self:security setcheckreqprot;
 
 # MTP sync
-allow kernel sdcard_internal:file write;
+allow kernel sdcard_internal:file { read write };
 
 ###
 ### neverallow rules