Allow sensor hal to connect to CHRE HAL

These policies are required to let DropDetect and IpHeath communicate
with CHRE HAL directly after CHRE multiclient HAL is enabled.

Bug: 324316275
Test: Trigger drop detection and observed corresponding logs
  are generated.
Change-Id: Icc087b59ff594224d7e637212558e68fb3f86437
diff --git a/chre/sepolicy/hal_contexthub_default.te b/chre/sepolicy/hal_contexthub_default.te
index 542d383..87e3a42 100644
--- a/chre/sepolicy/hal_contexthub_default.te
+++ b/chre/sepolicy/hal_contexthub_default.te
@@ -32,3 +32,6 @@
 
 # Allow context hub HAL to block suspend, which is required to use EPOLLWAKEUP
 allow hal_contexthub_default self:global_capability2_class_set block_suspend;
+
+# Allow binder calls with clients
+binder_call(hal_contexthub_default, hal_sensors_default)