Add @UnsupportedAppUsage to test apis that are known to be used by apps.

go/testapi-enforcement

Bug: 133832325
Test: m
Change-Id: Ifc8db120640a1554dcbf1722e61e09c7ddc65dd6
Merged-In: Ifc8db120640a1554dcbf1722e61e09c7ddc65dd6
diff --git a/core/java/android/content/Context.java b/core/java/android/content/Context.java
index a8c1216..a3b918d 100644
--- a/core/java/android/content/Context.java
+++ b/core/java/android/content/Context.java
@@ -5300,6 +5300,7 @@
      * Get the user associated with this context
      * @hide
      */
+    @UnsupportedAppUsage
     @TestApi
     public @UserIdInt int getUserId() {
         return android.os.UserHandle.myUserId();
@@ -5416,6 +5417,7 @@
      * @return Returns the {@link Display} object this context is associated with.
      * @hide
      */
+    @UnsupportedAppUsage
     @TestApi
     public abstract Display getDisplay();