Soft removal LocalTansport#dataManagementLabel

This API was deprecated in Q and so moves to soft-removal in R.

Bug: 134661849
Test: m clobber; m -j and ensure compile completes without errors
Test: atest CtsBackupTestCases
Change-Id: I749bb26155ad63245065d32d82ffe995a7d30fa5
diff --git a/packages/LocalTransport/src/com/android/localtransport/LocalTransport.java b/packages/LocalTransport/src/com/android/localtransport/LocalTransport.java
index 4408ef5..be3bcc7 100644
--- a/packages/LocalTransport/src/com/android/localtransport/LocalTransport.java
+++ b/packages/LocalTransport/src/com/android/localtransport/LocalTransport.java
@@ -16,6 +16,7 @@
 
 package com.android.localtransport;
 
+import android.annotation.Nullable;
 import android.app.backup.BackupAgent;
 import android.app.backup.BackupDataInput;
 import android.app.backup.BackupDataOutput;
@@ -142,11 +143,18 @@
         return null;
     }
 
+    /** @removed Replaced with dataManagementIntentLabel in the API */
     public String dataManagementLabel() {
         return TRANSPORT_DATA_MANAGEMENT_LABEL;
     }
 
     @Override
+    @Nullable
+    public CharSequence dataManagementIntentLabel() {
+        return TRANSPORT_DATA_MANAGEMENT_LABEL;
+    }
+
+    @Override
     public String transportDirName() {
         return TRANSPORT_DIR_NAME;
     }