Use hand written hasCode for ChangeIdStateQuery

Because Objects.hash(Object... values) will always create an array
to wrap the "..." arguments, with additional auto-boxing for all
primitive type arguments.

This can reduce the execution time of ChangeIdStateQuery#hashCode()
by 8 times, which is usually the main cost of
CompatChanges#isChangeEnabled.

Bug: 208449209
Test: atest android.app.compat.CompatChangesTest

Change-Id: I863aa1d35e7448b5a965368272198c4529253ae0

core/java/android/app/compat/ChangeIdStateQuery.java

@@ -85,6 +85,14 @@ final class ChangeIdStateQuery {
 
     @Override
     public int hashCode() {
-        return Objects.hash(type, changeId, packageName, uid, userId);
+        int result = 1;
+        result = 31 * result + type;
+        result = 31 * result + (int) (changeId ^ (changeId >>> 32));
+        if (packageName != null) {
+            result = 31 * result + packageName.hashCode();
+        }
+        result = 31 * result + uid;
+        result = 31 * result + userId;
+        return result;
     }
 }