title: "android:" prefix in styles and themes
body: <p>Assume i want to change a background color for my button and my theme is AppCompat. </p>
  
  <p>I know that in Android >= 21 (lollipop) i should use <code>android:colorButtonNormal</code>
  and pre-lollipop i should just use <code>colorButtonNormal</code>.</p>
  
  <p>But if i use AppCompat 27.0.0 for example, then the minimum supported API level should be 4.0 (API 14) according to the android developer website: <a href="https://developer.android.com/topic/libraries/support-library/index.html" rel="nofollow noreferrer">https://developer.android.com/topic/libraries/support-library/index.html</a></p>
  
  <p>does this mean that i can use <code>android:colorButtonNormal</code> for all versions of android above API 14 (including lollipop)? or should i still use two different versions of the styles?</p>
  
  <p>I personally think that i should include both but i want some confirmation on this</p>