remove androidx.camera stuff from layout. missed it on the last cleanup and this caused a crash on audio and video calls

Author: zoff99

android-refimpl-app/app/src/main/res/layout/activity_calling.xml

@@ -382,16 +382,6 @@
                     android:background="@drawable/border_001"
                     android:padding="5dp">
 
-                    <androidx.camera.view.PreviewView
-                        android:id="@+id/camera_preview_view"
-                        android:layout_width="120dp"
-                        android:layout_height="160dp"
-                        android:layout_gravity="center"
-                        android:layout_margin="0dp"
-                        android:elevation="12dp"
-                        android:gravity="center"
-                        android:padding="0dp" />
-
                     <com.zoffcc.applications.trifa.CameraDrawingOverlay
                         android:id="@+id/camera_drawing_overlay"
                         android:layout_width="120dp"