Fix toast font color

Bug: 1145890
Change-Id: I6c8cc8b063640dd4bcb4b388515bc391cee68966
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2521046Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Gayane Petrosyan <gayane@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824558}

ui/android/java/res/layout/custom_toast_layout.xml

@@ -10,4 +10,4 @@
     android:gravity="center"
     android:minHeight="44dp"
     android:singleLine="true"
-    android:textAppearance="@style/TextAppearance.TextSmall.Primary.Light"/>
+    android:textAppearance="@style/TextAppearance.TextSmall.Primary.Dark"/>
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