Enable custom clock feature

- Enable ClockOptionsProvider and the flag let SystemUI(keyguard) have
the ability to apply custom clock
- Remove Analog and Bubble clock from SystemUI

Bug: 146530441
Test: `adb shell content query --uri content://com.android.keyguard.clock/list_options` will list available provider, `adb shell settings put secure lock_screen_custom_clock_face "com.android.keyguard.clock.BubbleClockController"` will not switch to Bubble clock.
Change-Id: Iecfb5e2ea0cc72ca6eb1e16ca0dc0213a3257b6e

packages/SystemUI/AndroidManifest.xml

@@ -696,8 +696,7 @@
         <provider
             android:name="com.android.keyguard.clock.ClockOptionsProvider"
             android:authorities="com.android.keyguard.clock"
-            android:enabled="false"
-            android:exported="false"
+            android:exported="true"
             android:grantUriPermissions="true">
         </provider>
 

packages/SystemUI/src/com/android/keyguard/KeyguardClockSwitch.java

@@ -51,7 +51,7 @@ import javax.inject.Named;
 public class KeyguardClockSwitch extends RelativeLayout {
 
     private static final String TAG = "KeyguardClockSwitch";
-    private static final boolean CUSTOM_CLOCKS_ENABLED = false;
+    private static final boolean CUSTOM_CLOCKS_ENABLED = true;
 
     /**
      * Animation fraction when text is transitioned to/from bold.

packages/SystemUI/src/com/android/keyguard/clock/ClockManager.java

@@ -149,8 +149,6 @@ public final class ClockManager {
         LayoutInflater layoutInflater = injectionInflater.injectable(LayoutInflater.from(context));
 
         addBuiltinClock(() -> new DefaultClockController(res, layoutInflater, colorExtractor));
-        addBuiltinClock(() -> new BubbleClockController(res, layoutInflater, colorExtractor));
-        addBuiltinClock(() -> new AnalogClockController(res, layoutInflater, colorExtractor));
 
         // Store the size of the display for generation of clock preview.
         DisplayMetrics dm = res.getDisplayMetrics();
@@ -211,7 +209,8 @@ public final class ClockManager {
         return mContentObserver;
     }
 
-    private void addBuiltinClock(Supplier<ClockPlugin> pluginSupplier) {
+    @VisibleForTesting
+    void addBuiltinClock(Supplier<ClockPlugin> pluginSupplier) {
         ClockPlugin plugin = pluginSupplier.get();
         mPreviewClocks.addClockPlugin(plugin);
         mBuiltinClocks.add(pluginSupplier);

packages/SystemUI/tests/src/com/android/keyguard/clock/ClockManagerTest.java

@@ -93,6 +93,8 @@ public final class ClockManagerTest extends SysuiTestCase {
                 mMockPluginManager, mMockColorExtractor, mMockContentResolver,
                 mMockCurrentUserObserable, mMockSettingsWrapper, mFakeDockManager);
 
+        mClockManager.addBuiltinClock(() -> new BubbleClockController(
+                getContext().getResources(), inflater, mMockColorExtractor));
         mClockManager.addOnClockChangedListener(mMockListener1);
         mClockManager.addOnClockChangedListener(mMockListener2);
         reset(mMockListener1, mMockListener2);