Hide the new bouncer message views by default

They take up space in the layout even though we don't display any messages
The CL ag/23085660 that removes these views from layout when the flag is disabled couldn't be merged on time for the udc-dev cutoff

Fixes: 282890822
Test: verified manually, flashed the build, enabled layout bounds through dev options and don't see the new views on bouncer.
Change-Id: I90c3e325f01535fbc1edfe669d80541e901b6841

packages/SystemUI/src/com/android/systemui/keyguard/bouncer/ui/BouncerMessageView.kt

@@ -41,6 +41,8 @@ class BouncerMessageView : LinearLayout {
         super.onFinishInflate()
         primaryMessageView = findViewById(R.id.bouncer_primary_message_area)
         secondaryMessageView = findViewById(R.id.bouncer_secondary_message_area)
+        primaryMessageView?.disable()
+        secondaryMessageView?.disable()
     }
 
     fun init(factory: KeyguardMessageAreaController.Factory) {