Bug 937641 - Move toolbar-related classes to the toolbar package (r=sriram)

--HG--
rename : mobile/android/base/AutocompleteHandler.java => mobile/android/base/toolbar/AutocompleteHandler.java
rename : mobile/android/base/BackButton.java => mobile/android/base/toolbar/BackButton.java
rename : mobile/android/base/BrowserToolbar.java => mobile/android/base/toolbar/BrowserToolbar.java
rename : mobile/android/base/BrowserToolbarBackground.java => mobile/android/base/toolbar/BrowserToolbarBackground.java
rename : mobile/android/base/CanvasDelegate.java => mobile/android/base/toolbar/CanvasDelegate.java
rename : mobile/android/base/ForwardButton.java => mobile/android/base/toolbar/ForwardButton.java
rename : mobile/android/base/PageActionLayout.java => mobile/android/base/toolbar/PageActionLayout.java
rename : mobile/android/base/ShapedButton.java => mobile/android/base/toolbar/ShapedButton.java
rename : mobile/android/base/TabCounter.java => mobile/android/base/toolbar/TabCounter.java