[Unity][Android] Use UnifiedConsentServiceBridge to update sync prefs

This CL changes SyncAndServicesPreferences to make
UnifiedConsentServiceBridge.isUnifiedConsentGiven a source of truth when
updating prefs. Before, mUseSyncAndAllServices was used in some places,
leading to inconsistencies when UnifiedConsent state can't be changed
(for example, because of a custom passphrase).

Bug: 882884
Change-Id: Ie9be1b73284a7a818c21d702c47712b787d52846
Reviewed-on: https://chromium-review.googlesource.com/1219927Reviewed-by: Theresa <twellington@chromium.org>
Commit-Queue: Boris Sazonov <bsazonov@chromium.org>
Cr-Commit-Position: refs/heads/master@{#590349}

chrome/android/java/src/org/chromium/chrome/browser/preferences/SyncAndServicesPreferences.java

@@ -484,7 +484,7 @@ public class SyncAndServicesPreferences extends PreferenceFragment
 
     /** Enables sync if any of the data types is selected, otherwise disables sync. */
     private void updateSyncStateFromSelectedModelTypes() {
-        boolean shouldEnableSync = mUseSyncAndAllServices.isChecked()
+        boolean shouldEnableSync = UnifiedConsentServiceBridge.isUnifiedConsentGiven()
                 || !getSelectedModelTypes().isEmpty() || !canDisableSync();
         if (mIsSyncEnabled == shouldEnableSync) return;
         mIsSyncEnabled = shouldEnableSync;
@@ -537,7 +537,7 @@ public class SyncAndServicesPreferences extends PreferenceFragment
         updateSyncStateFromSelectedModelTypes();
         if (!mIsSyncEnabled) return;
 
-        boolean syncEverything = mUseSyncAndAllServices.isChecked();
+        boolean syncEverything = UnifiedConsentServiceBridge.isUnifiedConsentGiven();
         mProfileSyncService.setPreferredDataTypes(syncEverything, getSelectedModelTypes());
         // Update the invalidation listener with the set of types we are enabling.
         InvalidationController invController = InvalidationController.get();
@@ -686,7 +686,7 @@ public class SyncAndServicesPreferences extends PreferenceFragment
      * sync being turned on and the engine initialization completing.
      */
     private void updateDataTypeState() {
-        boolean syncEverything = mUseSyncAndAllServices.isChecked();
+        boolean syncEverything = UnifiedConsentServiceBridge.isUnifiedConsentGiven();
         boolean passwordSyncConfigurable = mProfileSyncService.isEngineInitialized()
                 && mProfileSyncService.isCryptographerReady();
         boolean hasCustomPassphrase = mProfileSyncService.isEngineInitialized()