Use new UnsupportedAppUsage annotation.

Existing annotations in libcore/ and frameworks/ will deleted after the migration. This also means that any java library that compiles @UnsupportedAppUsage requires a direct dependency on "unsupportedappusage" java_library.

Bug: 145132366
Test: m && diff unsupportedappusage_index.csv
Change-Id: I6ab53570aca580fbee1fcc927871caa09780f58f
diff --git a/core/java/android/content/ContentProvider.java b/core/java/android/content/ContentProvider.java
index 2240823..393d488 100644
--- a/core/java/android/content/ContentProvider.java
+++ b/core/java/android/content/ContentProvider.java
@@ -27,8 +27,8 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.annotation.UnsupportedAppUsage;
 import android.app.AppOpsManager;
+import android.compat.annotation.UnsupportedAppUsage;
 import android.content.pm.PackageManager;
 import android.content.pm.PathPermission;
 import android.content.pm.ProviderInfo;