nit changes

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

@@ -1,54 +1,42 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-
  <style name="OppiaTheme" parent="Theme.AppCompat.Light.DarkActionBar">
  <item name="colorPrimary">@color/colorPrimary</item>
  <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
  <item name="colorAccent">@color/colorPrimary</item>
  </style>
-
  <style name="OppiaThemeWithoutActionBar" parent="Theme.AppCompat.Light.NoActionBar">
  <item name="colorPrimary">@color/colorPrimary</item>
  <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
  <item name="colorAccent">@color/colorAccent</item>
  </style>
-
  <style name="SplashScreenTheme" parent="OppiaThemeWithoutActionBar">
  <item name="android:windowBackground">@drawable/splash_page</item>
  <item name="android:windowAnimationStyle">@style/FadeTransitionAnimation.Activity</item>
  </style>
-
  <!-- Base style for animations. This style specifies no animations. -->
- <style name="FadeTransitionAnimation" />
-
+ <style name="FadeTransitionAnimation"/>
  <!-- Standard animations for a full-screen window or activity. -->
  <style name="FadeTransitionAnimation.Activity">
  <item name="android:activityOpenEnterAnimation">@anim/fade_in</item>
  <item name="android:activityOpenExitAnimation">@anim/fade_out</item>
  </style>
-
  <style name="FullScreenDialogStyle" parent="Theme.AppCompat.Dialog">
  <item name="android:windowNoTitle">true</item>
  <item name="colorPrimaryDark">@color/colorConceptToolbarHeading</item>
-
  <!-- Set this to true if you want Full Screen without status bar -->
  <item name="android:windowFullscreen">false</item>
-
  <item name="android:windowIsFloating">false</item>
-
  <!-- This is important! Don't forget to set window background -->
  <item name="android:windowBackground">@color/colorConceptCardBackground</item>
-
  <!-- Additionally if you want animations when dialog opening -->
  <item name="android:windowEnterAnimation">@anim/slide_up</item>
  <item name="android:windowExitAnimation">@anim/slide_down</item>
  </style>
  <style name="OppiaTheme.NoActionBar">
  <item name="windowActionBar">false</item>
  <item name="windowNoTitle">true</item>
-
  </style>
-
  <!-- STATE BUTTON ACTIVE STYLE -->
  <style name="StateButtonActive" parent="TextAppearance.AppCompat.Widget.Button">
  <item name="android:layout_width">wrap_content</item>
@@ -63,7 +51,6 @@
  <item name="android:textSize">14sp</item>
  <item name="android:clickable">true</item>
  </style>
-
  <!-- STATE BUTTON INACTIVE STYLE -->
  <style name="StateButtonInactive" parent="TextAppearance.AppCompat.Widget.Button">
  <item name="android:layout_width">wrap_content</item>