Add new IGrilAntennaTuningSerive interface to twoshay

Fixed denial:
SELinux : avc:  denied  { add } for pid=911 uid=0 name=com.google.input.algos.gril.IGrilAntennaTuningService/default scontext=u:r:twoshay:s0 tcontext=u:object_r:default_android_service:s0 tclass=service_manager permissive=0

Bug: 267529399

Test: boot, see no denials

Change-Id: I7278e0b9ee7c72231e654e1d35042587fe6faa54
Signed-off-by: Mingguang Xu <mingguangxu@google.com>
diff --git a/input/service_contexts b/input/service_contexts
index 95e70f8..ed69aef 100644
--- a/input/service_contexts
+++ b/input/service_contexts
@@ -1 +1,2 @@
+com.google.input.algos.gril.IGrilAntennaTuningService/default              u:object_r:gril_antenna_tuning_service:s0
 com.google.input.ITouchContextService/default              u:object_r:touch_context_service:s0