Multi-select to share Part 2

UI work to supprot multi-select. Long pressing starts selection mode.
For now, you can only share the contacts that you have selected.

Manual tests:
* Starting selection mode
* starting selection mode by long pressing the Me Profile
* RTL layout
* rotation in search mode
* rotation in selection mode
* typing on keyboard while in selection mode:
  $ adb shell input keyboard text 'this%sis%san%sexample' (should do nothing)
* press search key while in selection mode:
  $ adb shell input keyevent 84 (should do nothing)
* sharing contacts via multi selection

Bug: 19549465
Change-Id: If438bddfaaee1f69e4c888716f926abcd00ddbc6
diff --git a/res/values/colors.xml b/res/values/colors.xml
index c3bf79e..cb658b3 100644
--- a/res/values/colors.xml
+++ b/res/values/colors.xml
@@ -29,6 +29,10 @@
     <color name="actionbar_background_color">@color/primary_color</color>
     <color name="actionbar_background_color_dark">@color/primary_color_dark</color>
 
+    <color name="contextual_selection_bar_color">#616161</color>
+    <!-- Color of the status bar above the contextual selection bar. -->
+    <color name="contextual_selection_bar_status_bar_color">#424242</color>
+
     <color name="primary_color_dark">#0277bd</color>
     <color name="primary_color">#0288d1</color>