Turn on TV when pressing power or wake key during boot

Applies to HDMI-CEC playback devices only.

Boot isn't always triggered by the user and therefore shouldn't turn on an HDMI-connected TV.

However, if a power or wake key is pressed during boot, there is a clear user intention to use the Android device.
This CL makes the playback device turn on the connected TV in that
situation.

Test: atest PowerManagerServiceTest and atest com.android.server.hdmi
Bug: 183691245
Change-Id: I53e54d72a5c7fa54d27d743d80bad4644e897d2b

services/core/java/com/android/server/policy/PhoneWindowManager.java

@@ -3479,13 +3479,23 @@ public class PhoneWindowManager implements WindowManagerPolicy {
         if (!mSystemBooted) {
             // If we have not yet booted, don't let key events do anything.
             // Exception: Wake and power key events are forwarded to PowerManager to allow it to
-            // wake from quiescent mode during boot.
+            // wake from quiescent mode during boot. On these key events we also explicitly turn on
+            // the connected TV and switch HDMI input if we're a HDMI playback device.
+            boolean shouldTurnOnTv = false;
             if (down && (keyCode == KeyEvent.KEYCODE_POWER
                     || keyCode == KeyEvent.KEYCODE_TV_POWER)) {
                 wakeUpFromPowerKey(event.getDownTime());
+                shouldTurnOnTv = true;
             } else if (down && (isWakeKey || keyCode == KeyEvent.KEYCODE_WAKEUP)
                     && isWakeKeyWhenScreenOff(keyCode)) {
                 wakeUpFromWakeKey(event);
+                shouldTurnOnTv = true;
+            }
+            if (shouldTurnOnTv) {
+                final HdmiControl hdmiControl = getHdmiControl();
+                if (hdmiControl != null) {
+                    hdmiControl.turnOnTv();
+                }
             }
             return 0;
         }