Change work profile switch to floating button

This is an initial CL to replace the old switch button. This CL only
focusses on introducing the new floating action button:
* Remove the work profile switch
* Add extended floating action button for switching between profiles
* Hide the button in preview mode and when an item is selected
* Hide the button in Album photos view

More specifications will follow soon

Bug: 190727775
Test: manual

Change-Id: I9231a9d13bc5e237feb137ed9c43bd5e933a8e53
Merged-In: I9231a9d13bc5e237feb137ed9c43bd5e933a8e53
(cherry picked from commit 3970fee99898cd4ab20aa8a3bacedf7b833f5c84)
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index c911972..8e6e12f 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -65,4 +65,6 @@
     <!-- PhotoPicker Preview text -->
     <dimen name="preview_add_text_size">14sp</dimen>
     <dimen name="preview_deselect_text_size">16sp</dimen>
+    <!-- PhotoPicker Work Profile -->
+    <dimen name="picker_profile_button_margin_bottom">32dp</dimen>
 </resources>