Set Root.FLAG_LOCAL_ONLY for MTP roots.

The flag indicate whether the root needs network access or not. MTP
should be LOCAL_ONLY root.

Bug: 30867267

Change-Id: Ia272d4a389cc1ca628d7b963caa37f3dbb6747e3
(cherry picked from commit 83c679e7221460fc50e91402a34787e1866d94ef)
diff --git a/packages/MtpDocumentsProvider/src/com/android/mtp/MtpDatabase.java b/packages/MtpDocumentsProvider/src/com/android/mtp/MtpDatabase.java
index cce619e..4950af3 100644
--- a/packages/MtpDocumentsProvider/src/com/android/mtp/MtpDatabase.java
+++ b/packages/MtpDocumentsProvider/src/com/android/mtp/MtpDatabase.java
@@ -873,7 +873,7 @@
     }
 
     private static int getRootFlags(int[] operationsSupported) {
-        int rootFlag = Root.FLAG_SUPPORTS_IS_CHILD;
+        int rootFlag = Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_LOCAL_ONLY;
         if (MtpDeviceRecord.isWritingSupported(operationsSupported)) {
             rootFlag |= Root.FLAG_SUPPORTS_CREATE;
         }
diff --git a/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDatabaseTest.java b/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDatabaseTest.java
index 404047b..8c13c81 100644
--- a/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDatabaseTest.java
+++ b/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDatabaseTest.java
@@ -128,7 +128,7 @@
             cursor.moveToNext();
             assertEquals(1, getInt(cursor, Root.COLUMN_ROOT_ID));
             assertEquals(
-                    Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_SUPPORTS_CREATE,
+                    Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_SUPPORTS_CREATE | Root.FLAG_LOCAL_ONLY,
                     getInt(cursor, Root.COLUMN_FLAGS));
             assertEquals(R.drawable.ic_root_mtp, getInt(cursor, Root.COLUMN_ICON));
             assertEquals("Device Storage", getString(cursor, Root.COLUMN_TITLE));
diff --git a/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDocumentsProviderTest.java b/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDocumentsProviderTest.java
index 9ed15c8..d19b460 100644
--- a/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDocumentsProviderTest.java
+++ b/packages/MtpDocumentsProvider/tests/src/com/android/mtp/MtpDocumentsProviderTest.java
@@ -210,7 +210,11 @@
             assertEquals(2, cursor.getCount());
             cursor.moveToNext();
             assertEquals("1", cursor.getString(0));
-            assertEquals(Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_SUPPORTS_CREATE, cursor.getInt(1));
+            assertEquals(
+                    Root.FLAG_SUPPORTS_IS_CHILD |
+                    Root.FLAG_SUPPORTS_CREATE |
+                    Root.FLAG_LOCAL_ONLY,
+                    cursor.getInt(1));
             assertEquals(R.drawable.ic_root_mtp, cursor.getInt(2));
             assertEquals("Device A Storage A", cursor.getString(3));
             assertEquals("1", cursor.getString(4));
@@ -225,7 +229,8 @@
             cursor.moveToNext();
             cursor.moveToNext();
             assertEquals("2", cursor.getString(0));
-            assertEquals(Root.FLAG_SUPPORTS_IS_CHILD, cursor.getInt(1));
+            assertEquals(
+                    Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_LOCAL_ONLY, cursor.getInt(1));
             assertEquals(R.drawable.ic_root_mtp, cursor.getInt(2));
             assertEquals("Device B Storage B", cursor.getString(3));
             assertEquals("2", cursor.getString(4));
@@ -271,7 +276,9 @@
 
             cursor.moveToNext();
             assertEquals("1", cursor.getString(0));
-            assertEquals(Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_SUPPORTS_CREATE, cursor.getInt(1));
+            assertEquals(
+                    Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_SUPPORTS_CREATE | Root.FLAG_LOCAL_ONLY,
+                    cursor.getInt(1));
             assertEquals(R.drawable.ic_root_mtp, cursor.getInt(2));
             assertEquals("Device A", cursor.getString(3));
             assertEquals("1", cursor.getString(4));
@@ -279,7 +286,9 @@
 
             cursor.moveToNext();
             assertEquals("2", cursor.getString(0));
-            assertEquals(Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_SUPPORTS_CREATE, cursor.getInt(1));
+            assertEquals(
+                    Root.FLAG_SUPPORTS_IS_CHILD | Root.FLAG_SUPPORTS_CREATE | Root.FLAG_LOCAL_ONLY,
+                    cursor.getInt(1));
             assertEquals(R.drawable.ic_root_mtp, cursor.getInt(2));
             assertEquals("Device B Storage B", cursor.getString(3));
             assertEquals("2", cursor.getString(4));