Add @UnsupportedAppUsage annotations

For packages:
  android.content.res
  android.content.pm.split
  android.content.pm.permission
  android.content.pm.dex
  android.content.pm
  android.content.om
  android.content

This is an automatically generated CL. See go/UnsupportedAppUsage
for more details.

Exempted-From-Owner-Approval: Mechanical changes to the codebase
which have been approved by Android API council and announced on
android-eng@

Bug: 110868826
Test: m
Change-Id: Ia79256a3d04e16dd78331a61af0dcddc5fc1599b
diff --git a/core/java/android/content/res/DrawableCache.java b/core/java/android/content/res/DrawableCache.java
index 7b27fac..d4f0ca5 100644
--- a/core/java/android/content/res/DrawableCache.java
+++ b/core/java/android/content/res/DrawableCache.java
@@ -16,6 +16,7 @@
 
 package android.content.res;
 
+import android.annotation.UnsupportedAppUsage;
 import android.graphics.drawable.Drawable;
 
 /**
@@ -31,6 +32,7 @@
      * @return a new instance of the resource, or {@code null} if not in
      *         the cache
      */
+    @UnsupportedAppUsage
     public Drawable getInstance(long key, Resources resources, Resources.Theme theme) {
         final Drawable.ConstantState entry = get(key, theme);
         if (entry != null) {