fix: styling stretched on big phone screen

app/src/main/res/layout-land/fragment_twibbon.xml

@@ -23,13 +23,13 @@
             app:layout_constraintEnd_toStartOf="@id/captureButton"
             app:layout_constraintBottom_toBottomOf="parent"
             android:layout_marginStart="50dp"
-            android:layout_marginEnd="50dp"
             android:layout_gravity="center">
 
             <ImageButton
                 android:id="@+id/leftButton"
-                android:layout_width="35dp"
+                android:layout_width="0dp"
                 android:layout_height="35dp"
+                android:layout_weight="1"
                 android:layout_gravity="start|center"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintEnd_toStartOf="@id/previewView"
@@ -66,8 +66,9 @@
 
             <ImageButton
                 android:id="@+id/rightButton"
-                android:layout_width="35dp"
+                android:layout_width="0dp"
                 android:layout_height="35dp"
+                android:layout_weight="1"
                 android:layout_gravity="end|center"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintStart_toEndOf="@id/previewView"

app/src/main/res/layout/fragment_twibbon.xml

@@ -28,8 +28,9 @@
 
             <ImageButton
                 android:id="@+id/leftButton"
-                android:layout_width="35dp"
+                android:layout_width="0dp"
                 android:layout_height="35dp"
+                android:layout_weight="1"
                 android:layout_gravity="start|center"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintEnd_toStartOf="@id/previewView"
@@ -40,9 +41,8 @@
                 android:contentDescription="@string/left_arrow" />
 
             <FrameLayout
-                android:layout_width="0dp"
+                android:layout_width="300dp"
                 android:layout_height="300dp"
-                android:layout_weight="1"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintEnd_toEndOf="parent"
                 android:layout_gravity="center" >
@@ -65,8 +65,9 @@
 
             <ImageButton
                 android:id="@+id/rightButton"
-                android:layout_width="35dp"
+                android:layout_width="0dp"
                 android:layout_height="35dp"
+                android:layout_weight="1"
                 android:layout_gravity="end|center"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintStart_toEndOf="@id/previewView"