Disable key repeats when the screen is off.

This prevents an endless stream of key repeats spamming the keyguard
if a volume key is pressed at the same time you turn off the screen
with the power button.

This is part of a fix for bug b/2198537

Change-Id: I0d7e335fee79cbebba96b2cd908458c3c94c839e
Signed-off-by: Mike Lockwood <lockwood@android.com>

policy/com/android/internal/policy/impl/PhoneWindowManager.java

@@ -2218,5 +2218,10 @@ public class PhoneWindowManager implements WindowManagerPolicy {
             mPowerManager.userActivity(curTime, false, LocalPowerManager.OTHER_EVENT);
         }
     }
+
+    public boolean allowKeyRepeat() {
+        // disable key repeat when screen is off
+        return mScreenOn;
+    }
 }