Keep keyguard from starting after finished call when screen is on

Previously keyguard would start after a call ended, even though
the screen was on, if the screen had not been turned off since
phone startup.

Change-Id: I03c18a0bb2a58760614645871f4703afb9a0677d

Author: SGA-Daniel-Hansson

policy/src/com/android/internal/policy/impl/KeyguardViewMediator.java

@@ -230,7 +230,7 @@ public class KeyguardViewMediator implements KeyguardViewCallback,
 
     private KeyguardUpdateMonitor mUpdateMonitor;
 
-    private boolean mScreenOn = false;
+    private boolean mScreenOn;
 
     // last known state of the cellular connection
     private String mPhoneState = TelephonyManager.EXTRA_STATE_IDLE;
@@ -318,6 +318,8 @@ public KeyguardViewMediator(Context context, PhoneWindowManager callback,
         final ContentResolver cr = mContext.getContentResolver();
         mShowLockIcon = (Settings.System.getInt(cr, "show_status_bar_lock", 0) == 1);
 
+        mScreenOn = mPM.isScreenOn();
+
         mLockSounds = new SoundPool(1, AudioManager.STREAM_SYSTEM, 0);
         String soundPath = Settings.System.getString(cr, Settings.System.LOCK_SOUND);
         if (soundPath != null) {