colors: add missing accent_material_{700,50} resources.

Those two resources were only defined for watches and had no default
counterparts.

BUG: 32786346
Change-Id: I0868d34d1df55c6dfd26d13c3a7d468866603a97
(cherry picked from commit fade1235e5c3d34933e727bf067e85fd7fd157b9)
diff --git a/core/res/res/values/colors_material.xml b/core/res/res/values/colors_material.xml
index 92426c6..37feff8 100644
--- a/core/res/res/values/colors_material.xml
+++ b/core/res/res/values/colors_material.xml
@@ -36,8 +36,10 @@
     <color name="tertiary_material_settings">@color/material_blue_grey_700</color>
     <color name="quaternary_material_settings">@color/material_blue_grey_200</color>
 
+    <color name="accent_material_700">@color/material_deep_teal_700</color>
     <color name="accent_material_light">@color/material_deep_teal_500</color>
     <color name="accent_material_dark">@color/material_deep_teal_200</color>
+    <color name="accent_material_50">@color/material_deep_teal_50</color>
 
     <color name="button_material_dark">#ff5a595b</color>
     <color name="button_material_light">#ffd6d7d7</color>