Bug 1049600 - Show search engine branding. r=wesj

--HG--
rename : mobile/android/search/java/org/mozilla/search/autocomplete/ClearableEditText.java => mobile/android/search/java/org/mozilla/search/autocomplete/SearchBar.java
rename : mobile/android/search/res/layout/clearable_edit_text.xml => mobile/android/search/res/layout/search_bar.xml