Revert "Use new UnsupportedAppUsage annotation."

This reverts commit a5264903e22bc741add895133474ea13a370de4c.

Reason for revert: Droidcop-triggered revert due to breakage https://android-build.googleplex.com/builds/quarterdeck?branch=git_master&target=sdk_phone_armv7-sdk&lkgb=6083299&lkbb=6085371&fkbb=6083313, bug b/146533269

Change-Id: Ie5b031d7b277cf0e09b0a9776b26bf74f5f69e70
diff --git a/telecomm/java/android/telecom/Connection.java b/telecomm/java/android/telecom/Connection.java
index e07a637..c063279 100644
--- a/telecomm/java/android/telecom/Connection.java
+++ b/telecomm/java/android/telecom/Connection.java
@@ -21,9 +21,9 @@
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
 import android.annotation.TestApi;
+import android.annotation.UnsupportedAppUsage;
 import android.app.Notification;
 import android.bluetooth.BluetoothDevice;
-import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
 import android.hardware.camera2.CameraManager;
 import android.net.Uri;