base: Allow disabling color inversion support [1/2]

Via an overlay
Some kernels won't support that no more
Also make sure it's never enabled, even if the setting is set to true

Change-Id: Ia443eddca8d901f404433e3af96a25a91269f4f0
Signed-off-by: aswin7469 <aswinas@pixysos.com>

Author: idoybh

core/res/res/values/pixys_config.xml

@@ -223,4 +223,6 @@
     <!-- The list of package IDs that are allowed to skip camera high frame rate checks. -->
     <string-array name="config_cameraHFRPrivAppList" translatable="false" />
 
+    <!-- Display color inversion availability -->
+    <bool name="config_displayInversionAvailable">true</bool>
 </resources>

core/res/res/values/pixys_symbols.xml

@@ -118,4 +118,6 @@
     <!-- Camera -->
     <java-symbol type="array" name="config_cameraHFRPrivAppList" />
 
+    <!-- Display color inversion availability -->
+    <java-symbol type="bool" name="config_displayInversionAvailable" />
 </resources>

packages/SystemUI/src/com/android/systemui/ScreenDecorations.java

@@ -598,7 +598,10 @@ private void setupDecorationsInner() {
             removeHwcOverlay();
         }
 
-        if (hasOverlays() || hasHwcOverlay()) {
+        final boolean available = mContext.getResources().getBoolean(
+                    com.android.internal.R.bool.config_displayInversionAvailable);
+        if (!available) return;
+        if ((hasOverlays() || hasHwcOverlay())) {
             if (mIsRegistered) {
                 return;
             }

packages/SystemUI/src/com/android/systemui/qs/tiles/ColorInversionTile.java

@@ -130,6 +130,12 @@ protected void handleUpdateState(BooleanState state, Object arg) {
         state.contentDescription = state.label;
     }
 
+    @Override
+    public boolean isAvailable() {
+        return mContext.getResources().getBoolean(
+                com.android.internal.R.bool.config_displayInversionAvailable);
+    }
+
     @Override
     public int getMetricsCategory() {
         return MetricsEvent.QS_COLORINVERSION;

services/core/java/com/android/server/display/color/ColorDisplayService.java

@@ -384,8 +384,10 @@ public void onChange(boolean selfChange, Uri uri) {
                 false /* notifyForDescendants */, mContentObserver, mCurrentUser);
         cr.registerContentObserver(System.getUriFor(System.DISPLAY_COLOR_MODE),
                 false /* notifyForDescendants */, mContentObserver, mCurrentUser);
-        cr.registerContentObserver(Secure.getUriFor(Secure.ACCESSIBILITY_DISPLAY_INVERSION_ENABLED),
-                false /* notifyForDescendants */, mContentObserver, mCurrentUser);
+        if (isAccessibilityInversionAvailable()) {
+            cr.registerContentObserver(Secure.getUriFor(Secure.ACCESSIBILITY_DISPLAY_INVERSION_ENABLED),
+                    false /* notifyForDescendants */, mContentObserver, mCurrentUser);
+        }
         cr.registerContentObserver(
                 Secure.getUriFor(Secure.ACCESSIBILITY_DISPLAY_DALTONIZER_ENABLED),
                 false /* notifyForDescendants */, mContentObserver, mCurrentUser);
@@ -583,7 +585,13 @@ private boolean isAccessiblityDaltonizerEnabled() {
 
     private boolean isAccessiblityInversionEnabled() {
         return Secure.getIntForUser(getContext().getContentResolver(),
-            Secure.ACCESSIBILITY_DISPLAY_INVERSION_ENABLED, 0, mCurrentUser) != 0;
+            Secure.ACCESSIBILITY_DISPLAY_INVERSION_ENABLED, 0, mCurrentUser) != 0
+            && isAccessibilityInversionAvailable();
+    }
+
+    private boolean isAccessibilityInversionAvailable() {
+        return getContext().getResources().getBoolean(
+                com.android.internal.R.bool.config_displayInversionAvailable);
     }
 
     private boolean isAccessibilityEnabled() {

services/core/java/com/android/server/wm/WindowManagerService.java

@@ -821,8 +821,14 @@ final class SettingsObserver extends ContentObserver {
         public SettingsObserver() {
             super(new Handler());
             ContentResolver resolver = mContext.getContentResolver();
-            resolver.registerContentObserver(mDisplayInversionEnabledUri, false, this,
-                    UserHandle.USER_ALL);
+
+            final boolean displayInversionAvailable = mContext.getResources().getBoolean(
+                    com.android.internal.R.bool.config_displayInversionAvailable);
+            if (displayInversionAvailable) {
+                resolver.registerContentObserver(mDisplayInversionEnabledUri, false, this,
+                        UserHandle.USER_ALL);
+            }
+
             resolver.registerContentObserver(mWindowAnimationScaleUri, false, this,
                     UserHandle.USER_ALL);
             resolver.registerContentObserver(mTransitionAnimationScaleUri, false, this,