Hide integrity @IntDefs

Typedefs aren't meant to be exposed in the stubs.

Bug: 145982314
Test: m
Change-Id: I95a5040e2a83c21b736c1b79cf0f492076dfe67a
diff --git a/core/java/android/content/integrity/AtomicFormula.java b/core/java/android/content/integrity/AtomicFormula.java
index c8e164f..574a93f 100644
--- a/core/java/android/content/integrity/AtomicFormula.java
+++ b/core/java/android/content/integrity/AtomicFormula.java
@@ -44,6 +44,7 @@
 
     private static final String TAG = "AtomicFormula";
 
+    /** @hide */
     @IntDef(
             value = {
                 PACKAGE_NAME,
@@ -56,6 +57,7 @@
     @Retention(RetentionPolicy.SOURCE)
     public @interface Key {}
 
+    /** @hide */
     @IntDef(value = {EQ, LT, LE, GT, GE})
     @Retention(RetentionPolicy.SOURCE)
     public @interface Operator {}