Keyguard: Allow disabling fingerprint wake-and-unlock

 * When the fingerprint sensor is embedded in the power key,
   wake-and-unlock is total chaos. Add an option to disable it.
 * The default behavior is unchanged.

Change-Id: I50c0a857daba92c17470d8089aca94099c792956

Author: Steve Kondik

packages/SystemUI/res/values/lineage_config.xml

@@ -22,4 +22,10 @@
          * Right -> 53 (Gravity.TOP | Gravity.RIGHT)
     -->
     <integer name="hardware_ui_align">53</integer>
+
+    <!-- Should we listen for fingerprints when the screen is off?  Devices
+         with a rear-mounted sensor want this, but certain devices have
+         the sensor embedded in the power key and listening all the time
+         causes a poor experience. -->
+    <bool name="config_fingerprintWakeAndUnlock">true</bool>
 </resources>

packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java

@@ -224,6 +224,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener {
     private LockPatternUtils mLockPatternUtils;
     private final IDreamManager mDreamManager;
     private boolean mIsDreaming;
+    private final boolean mFingerprintWakeAndUnlock;
 
     /**
      * Short delay before restarting fingerprint authentication after a successful try
@@ -1128,6 +1129,8 @@ private KeyguardUpdateMonitor(Context context) {
         mSubscriptionManager = SubscriptionManager.from(context);
         mDeviceProvisioned = isDeviceProvisionedInSettingsDb();
         mStrongAuthTracker = new StrongAuthTracker(context);
+        mFingerprintWakeAndUnlock = mContext.getResources().getBoolean(
+                com.android.keyguard.R.bool.config_fingerprintWakeAndUnlock);
 
         // Since device can't be un-provisioned, we only need to register a content observer
         // to update mDeviceProvisioned when we are...
@@ -1228,11 +1231,18 @@ private boolean shouldListenForFingerprintAssistant() {
     }
 
     private boolean shouldListenForFingerprint() {
-        return (mKeyguardIsVisible || !mDeviceInteractive ||
-                (mBouncer && !mKeyguardGoingAway) || mGoingToSleep ||
-                shouldListenForFingerprintAssistant() || (mKeyguardOccluded && mIsDreaming))
-                && !mSwitchingUser && !isFingerprintDisabled(getCurrentUser())
-                && !mKeyguardGoingAway;
+        if (!mFingerprintWakeAndUnlock) {
+            return (mKeyguardIsVisible || mBouncer || shouldListenForFingerprintAssistant() ||
+                    (mKeyguardOccluded && mIsDreaming)) && mDeviceInteractive && !mGoingToSleep
+                    && !mSwitchingUser && !isFingerprintDisabled(getCurrentUser())
+                    && !mKeyguardGoingAway;
+        } else {
+            return (mKeyguardIsVisible || !mDeviceInteractive ||
+                    (mBouncer && !mKeyguardGoingAway) || mGoingToSleep ||
+                    shouldListenForFingerprintAssistant() || (mKeyguardOccluded && mIsDreaming))
+                    && !mSwitchingUser && !isFingerprintDisabled(getCurrentUser())
+                    && !mKeyguardGoingAway;
+        }
     }
 
     private void startListeningForFingerprint() {