implement material button

Signed-off-by: sowjanyakch <sowjanya.kch@gmail.com>

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

@@ -195,14 +195,20 @@
                 app:justifyContent="flex_end"
                 app:alignItems="center">
 
-            <Button
-                android:id="@+id/popup_menu"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:text="@string/end_call_for_everyone"
-                android:layout_marginEnd="8dp"
-                android:visibility="gone"
-                tools:visibility ="visible"/>
+                <com.google.android.material.button.MaterialButton
+                    android:id="@+id/popup_menu"
+                    android:layout_width="wrap_content"
+                    android:layout_height="wrap_content"
+                    android:text="@string/end_call_for_everyone"
+                    android:layout_marginEnd="8dp"
+                    android:visibility="gone"
+                    tools:visibility="visible"
+                    android:backgroundTint="@android:color/darker_gray"
+                    android:textColor="@android:color/holo_red_light"
+                    app:icon="@drawable/ic_call_end_white_24px"
+                    app:iconTint="@android:color/holo_red_light"
+                    app:iconGravity="textEnd"
+                    app:iconPadding="16dp" />
 
             <com.google.android.material.floatingactionbutton.FloatingActionButton
                 android:id="@+id/lower_hand_button"