Use const reference instead of pointer

Improve dispatcher api's by using const reference instead of pointer.
This would highlight the fact that the object is not nullable.

Bug: 140756730
Test: presubmit
Change-Id: I54d600815b973c6172b60d8f7a3ce4a12175b82e
diff --git a/services/inputflinger/dispatcher/InputTarget.h b/services/inputflinger/dispatcher/InputTarget.h
index 2e9bca2..1ba5eff 100644
--- a/services/inputflinger/dispatcher/InputTarget.h
+++ b/services/inputflinger/dispatcher/InputTarget.h
@@ -108,7 +108,7 @@
 
     // The subset of pointer ids to include in motion events dispatched to this input target
     // if FLAG_SPLIT is set.
-    BitSet32 pointerIds{};
+    BitSet32 pointerIds;
 };
 
 std::string dispatchModeToString(int32_t dispatchMode);