Fixed inconsistent gray background in Running app detail

This is a cherry pick of https://android-review.googlesource.com/#/c/35200/

Checked with UI that this backgroud color was not wanted.

Change-Id: I10cd6757ed17fd3cf34f04e5d14e6f210f78ab2c

src/com/android/settings/applications/RunningServiceDetails.java

@@ -439,7 +439,6 @@ public class RunningServiceDetails extends Fragment
         
         mAllDetails = (ViewGroup)view.findViewById(R.id.all_details);
         mSnippet = (ViewGroup)view.findViewById(R.id.snippet);
-        mSnippet.setBackgroundResource(com.android.internal.R.drawable.title_bar_medium);
         mSnippet.setPadding(0, mSnippet.getPaddingTop(), 0, mSnippet.getPaddingBottom());
         mSnippetViewHolder = new RunningProcessesView.ViewHolder(mSnippet);