Standardize and replace assets with vectors

Standarize naming of vector drawables and replace png
assets with vector drawables.

Test: build and run GoogleContactsTests
      manual side by side sanity check with previous version

Bug: 33251913
Change-Id: Iafea5c1bba738c57437888da999fc2909d0765fd
diff --git a/res/layout/search_bar_expanded.xml b/res/layout/search_bar_expanded.xml
index 945521f..9f90bc7 100644
--- a/res/layout/search_bar_expanded.xml
+++ b/res/layout/search_bar_expanded.xml
@@ -27,7 +27,7 @@
         android:layout_width="@dimen/search_box_icon_size"
         android:layout_height="@dimen/search_box_icon_size"
         android:layout_marginEnd="@dimen/search_box_navigation_icon_margin"
-        android:src="@drawable/ic_back_arrow"
+        android:src="@drawable/quantum_ic_arrow_back_vd_theme_24"
         android:background="?attr/selectableItemBackgroundBorderless"
         android:contentDescription="@string/action_menu_back_from_search"
         android:tint="@color/actionbar_background_color" />
@@ -53,7 +53,7 @@
         android:layout_height="@dimen/search_box_close_icon_size"
         android:layout_width="@dimen/search_box_close_icon_size"
         android:padding="@dimen/search_box_close_icon_padding"
-        android:src="@drawable/ic_close_24dp"
+        android:src="@drawable/quantum_ic_close_vd_theme_24"
         android:tint="@color/quantum_black_secondary_text"
         android:clickable="true"
         android:background="?attr/selectableItemBackgroundBorderless"