chore:remove the hardcoded colors

Author: angrezichatterbox

app/src/main/res/drawable/minikeyboard_background.xml

@@ -2,7 +2,7 @@
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:id="@+id/button_background_shape">
         <shape android:shape="rectangle">
-            <solid android:color="#3F3F46" />
+            <solid android:color="@color/mini_keyboard_color" />
             <corners android:radius="@dimen/small_margin" />
         </shape>
     </item>
@@ -12,7 +12,7 @@
             <stroke
                 android:width="1dp"
                 android:color="@color/divider_grey" />
-            <solid android:color="#3F3F46" />
+            <solid android:color="@color/mini_keyboard_color" />
             <corners android:radius="@dimen/small_margin" />
         </shape>
     </item>

app/src/main/res/values/colors.xml

@@ -19,6 +19,7 @@
     <color name="special_key_light">#aeb3be</color>
     <color name="special_key_dark">#202020</color>
     <color name="command_bar_color_dark">#2E2E2E</color>
+    <color name="mini_keyboard_color">#3F3F46</color>
 
     <color name="nav_bar_selected_color_light">@color/dark_scribe_color</color>
     <color name="nav_bar_selected_color_dark">@color/light_scribe_color</color>