Allow separate configuration of display color fade

Previously color fade before display power-off was disabled for devices
with a low-RAM configuration.  Some devices may not want this animation
even though they have a plenty of RAM, so allow it to be controlled
separately.

Bug: 284838712
Change-Id: I2369d10c293d7b05d55878a28f702a81428ddd15
Merged-In: I2369d10c293d7b05d55878a28f702a81428ddd15
Test: atest DisplayPowerControllerTest
Test: atest DisplayPowerController2Test

core/res/res/values/config.xml

@@ -2683,6 +2683,9 @@
          backlight values -->
     <bool name="config_displayBrightnessBucketsInDoze">false</bool>
 
+    <!-- True to skip the fade animation on display off event -->
+    <bool name="config_displayColorFadeDisabled">false</bool>
+
     <!-- Power Management: Specifies whether to decouple the auto-suspend state of the
          device from the display on/off state.
 

core/res/res/values/symbols.xml

@@ -3852,6 +3852,7 @@
   <java-symbol type="bool" name="config_dozeSupportsAodWallpaper" />
   <java-symbol type="bool" name="config_displayBlanksAfterDoze" />
   <java-symbol type="bool" name="config_displayBrightnessBucketsInDoze" />
+  <java-symbol type="bool" name="config_displayColorFadeDisabled" />
   <java-symbol type="integer" name="config_storageManagerDaystoRetainDefault" />
   <java-symbol type="string" name="config_headlineFontFamily" />
   <java-symbol type="string" name="config_headlineFontFamilyMedium" />

services/core/java/com/android/server/display/DisplayPowerController.java

@@ -718,7 +718,9 @@ final class DisplayPowerController implements AutomaticBrightnessController.Call
 
         setUpAutoBrightness(resources, handler);
 
-        mColorFadeEnabled = !ActivityManager.isLowRamDeviceStatic();
+        mColorFadeEnabled = !ActivityManager.isLowRamDeviceStatic()
+                && !resources.getBoolean(
+                  com.android.internal.R.bool.config_displayColorFadeDisabled);
         mColorFadeFadesConfig = resources.getBoolean(
                 com.android.internal.R.bool.config_animateScreenLights);
 

services/core/java/com/android/server/display/DisplayPowerController2.java

@@ -610,7 +610,9 @@ final class DisplayPowerController2 implements AutomaticBrightnessController.Cal
 
         setUpAutoBrightness(resources, handler);
 
-        mColorFadeEnabled = mInjector.isColorFadeEnabled();
+        mColorFadeEnabled = mInjector.isColorFadeEnabled()
+                && !resources.getBoolean(
+                  com.android.internal.R.bool.config_displayColorFadeDisabled);
         mColorFadeFadesConfig = resources.getBoolean(
                 R.bool.config_animateScreenLights);