Update Grip option tile and check icon UI

Screenshot: https://screenshot.googleplex.com/d4rw8qN5rpd.png
Spec: https://docs.google.com/presentation/d/15JadcGi5k1_0znUN_XdFpU7UxeXwxjK3Y7LxvhW5ETM/edit?ts=5e98f7bb#slide=id.g7c8f4a82bf_0_97

Test: Manually
Bug: 151287328
Change-Id: I821fe9fabeda59e47358ec801a211d88ce5c2f82
diff --git a/res/drawable/ic_check_circle_filled_24px.xml b/res/drawable/ic_check_circle_filled_24px.xml
index cacf1d8..01d2091 100644
--- a/res/drawable/ic_check_circle_filled_24px.xml
+++ b/res/drawable/ic_check_circle_filled_24px.xml
@@ -19,7 +19,7 @@
     android:viewportWidth="24"
     android:viewportHeight="24">
   <path
-      android:fillColor="@color/selected_check_background_color"
+      android:fillColor="@color/accent_color"
       android:pathData="M12,2C6.5,2 2,6.5 2,12s4.5,10 10,10s10,-4.5 10,-10S17.5,2 12,2zM10,17l-4,-4l1.4,-1.4l2.6,2.6l6.6,-6.6L18,9L10,17z"/>
   <path
       android:pathData="m8.0085,14.9866 l-1.9939,-1.994 0.6892,-0.6889 0.6892,-0.6889 1.2925,1.2926c0.7109,0.711 1.3035,1.2926 1.3169,1.2926 0.0134,0 1.5034,-1.4789 3.3111,-3.2865l3.2866,-3.2865 0.689,0.689 0.689,0.689 -3.9878,3.9878 -3.9878,3.9878z"
diff --git a/res/values/dimens.xml b/res/values/dimens.xml
index 5d5781a..3c78967 100644
--- a/res/values/dimens.xml
+++ b/res/values/dimens.xml
@@ -21,8 +21,8 @@
     <dimen name="tip_dot_size">8dp</dimen>
     <dimen name="tip_dot_line_width">2dp</dimen>
 
-    <dimen name="check_size">20dp</dimen>
-    <dimen name="check_offset">-4dp</dimen>
+    <dimen name="check_size">16dp</dimen>
+    <dimen name="check_offset">4dp</dimen>
 
     <dimen name="component_preview_page_bottom_margin">16dp</dimen>
 
@@ -38,8 +38,8 @@
     <dimen name="theme_option_font_sample_width">52dp</dimen>
     <dimen name="theme_option_sample_padding">5dp</dimen>
     <!-- Note, using dp instead of sp as this is just the "+" symbol, not text -->
-    <dimen name="option_tile_padding_vertical">12dp</dimen>
-    <dimen name="option_tile_padding_horizontal">10dp</dimen>
+    <dimen name="option_tile_padding_vertical">16dp</dimen>
+    <dimen name="option_tile_padding_horizontal">16dp</dimen>
 
     <dimen name="option_bottom_margin">8dp</dimen>
     <!-- Note, using dp instead of sp as this text is more like a "snapshot" of the font -->