[Chipbar] Fix the color of the start icon to match the new theme.

Fixes: 273969888
Bug: 267821684

Test: active unlock chipbar watch icon has correct tint in light and
dark mode
Test: media ttt chipbar with default icon and app icon has correct tint
in light and dark mode
Test: media ttt receiver default icon has correct tint in light and dark
mode
Test: atest MediaTttUtilsTest MediaTttChipControllerReceiverTest
ChipbarCoordinatorTest

Change-Id: I992d9f1654ee3592a3ffd7c5aa50f00af5194752
diff --git a/packages/SystemUI/res/layout/chipbar.xml b/packages/SystemUI/res/layout/chipbar.xml
index a317178..762dcdc 100644
--- a/packages/SystemUI/res/layout/chipbar.xml
+++ b/packages/SystemUI/res/layout/chipbar.xml
@@ -55,7 +55,7 @@
             android:layout_height="wrap_content"
             android:layout_weight="1"
             android:textSize="@dimen/chipbar_text_size"
-            android:textColor="@android:color/system_accent2_900"
+            android:textColor="@color/chipbar_text_and_icon_color"
             android:alpha="0.0"
             />