Reorder migration of settings from db to xml

Make sure we commit the Global table last, so that if the
runtime was restarted before the others were written, we don't
get into an inconsistent state of migration.

Not sure if this fixes the following bug, but it's one thing
that stood out as a possibility.

Bug: 27335488
Change-Id: I4166a157e9ff542b1d5e32797693417375e40581
diff --git a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
index a424d55..83974db 100644
--- a/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
+++ b/packages/SettingsProvider/src/com/android/providers/settings/SettingsProvider.java
@@ -1671,16 +1671,16 @@
 
         private void migrateLegacySettingsForUserLocked(DatabaseHelper dbHelper,
                 SQLiteDatabase database, int userId) {
-            // Move over the global settings if owner.
-            if (userId == UserHandle.USER_SYSTEM) {
-                final int globalKey = makeKey(SETTINGS_TYPE_GLOBAL, userId);
-                ensureSettingsStateLocked(globalKey);
-                SettingsState globalSettings = mSettingsStates.get(globalKey);
-                migrateLegacySettingsLocked(globalSettings, database, TABLE_GLOBAL);
-                globalSettings.persistSyncLocked();
-            }
+            // Move over the system settings.
+            final int systemKey = makeKey(SETTINGS_TYPE_SYSTEM, userId);
+            ensureSettingsStateLocked(systemKey);
+            SettingsState systemSettings = mSettingsStates.get(systemKey);
+            migrateLegacySettingsLocked(systemSettings, database, TABLE_SYSTEM);
+            systemSettings.persistSyncLocked();
 
             // Move over the secure settings.
+            // Do this after System settings, since this is the first thing we check when deciding
+            // to skip over migration from db to xml for a secondary user.
             final int secureKey = makeKey(SETTINGS_TYPE_SECURE, userId);
             ensureSettingsStateLocked(secureKey);
             SettingsState secureSettings = mSettingsStates.get(secureKey);
@@ -1688,12 +1688,16 @@
             ensureSecureSettingAndroidIdSetLocked(secureSettings);
             secureSettings.persistSyncLocked();
 
-            // Move over the system settings.
-            final int systemKey = makeKey(SETTINGS_TYPE_SYSTEM, userId);
-            ensureSettingsStateLocked(systemKey);
-            SettingsState systemSettings = mSettingsStates.get(systemKey);
-            migrateLegacySettingsLocked(systemSettings, database, TABLE_SYSTEM);
-            systemSettings.persistSyncLocked();
+            // Move over the global settings if owner.
+            // Do this last, since this is the first thing we check when deciding
+            // to skip over migration from db to xml for owner user.
+            if (userId == UserHandle.USER_SYSTEM) {
+                final int globalKey = makeKey(SETTINGS_TYPE_GLOBAL, userId);
+                ensureSettingsStateLocked(globalKey);
+                SettingsState globalSettings = mSettingsStates.get(globalKey);
+                migrateLegacySettingsLocked(globalSettings, database, TABLE_GLOBAL);
+                globalSettings.persistSyncLocked();
+            }
 
             // Drop the database as now all is moved and persisted.
             if (DROP_DATABASE_ON_MIGRATION) {