power profile: Add "ambient.on" to taimen power profile

"ambient.on" is used to estimate the power consumption
by always on display.

BUG: 112538888
Test: Compile, flash, check Advanced battery usage.

Change-Id: Ieaec0b0bc05939868ce602262325c9665151639f
diff --git a/overlay/frameworks/base/core/res/res/xml/power_profile.xml b/overlay/frameworks/base/core/res/res/xml/power_profile.xml
index b9ab9f3..6854eb7 100644
--- a/overlay/frameworks/base/core/res/res/xml/power_profile.xml
+++ b/overlay/frameworks/base/core/res/res/xml/power_profile.xml
@@ -151,6 +151,8 @@
         <value>212.147</value> <!-- 2457 MHz CPU speed -->
     </array>
 
+    <!-- Additional power used when screen is ambient mode -->
+    <item name="ambient.on">19</item>
     <!-- Additional power used when screen is turned on at minimum brightness -->
     <item name="screen.on">152.118</item>
     <!-- Additional power used when screen is at maximum brightness, compared to