AOD: Show keyguard indications in white

Fixes an issue where colored keyguard indications were hard
to read on AOD.

Change-Id: I6bbb6267278a7397327f1fc4d88304d83f5f1ff1
Fixes: 63686192
Test: Set up fingerprint; go to AOD; tap wrong finger; verify message is shown in white

packages/SystemUI/src/com/android/systemui/statusbar/KeyguardIndicationController.java

@@ -280,13 +280,10 @@ public class KeyguardIndicationController {
             if (mDozing) {
                 // If we're dozing, never show a persistent indication.
                 if (!TextUtils.isEmpty(mTransientIndication)) {
-                    // When dozing we ignore the initial text color and use white instead.
-                    // We don't wait to draw black text on a black background.
-                    int color = mTransientTextColor == mInitialTextColor ?
-                            Color.WHITE : mTransientTextColor;
+                    // When dozing we ignore any text color and use white instead, because
+                    // colors can be hard to read in low brightness.
+                    mTextView.setTextColor(Color.WHITE);
                     mTextView.switchIndication(mTransientIndication);
-                    mTextView.setTextColor(color);
-
                 } else {
                     mTextView.switchIndication(null);
                 }