Check light sensor is null for biometric logging

Bug: 327330325
Bug: 327095853
Test: ALSProbeTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:54534f9c7e2830ce98602ab50811d9aa38d3617d)
Merged-In: I7604f1dd8b1314822b141e18b1c2d6fb717db4ae
Change-Id: I7604f1dd8b1314822b141e18b1c2d6fb717db4ae
(cherry picked from commit 5eda411dbfa8861575db9aec1c7c3814a9f7a812)

2 files changed, 21 insertions, 3 deletions

diff --git a/services/core/java/com/android/server/biometrics/log/ALSProbe.java b/services/core/java/com/android/server/biometrics/log/ALSProbe.java
index d584c99cea72..d4e46a930124 100644
--- a/services/core/java/com/android/server/biometrics/log/ALSProbe.java
+++ b/services/core/java/com/android/server/biometrics/log/ALSProbe.java
@@ -179,15 +179,18 @@ final class ALSProbe implements Probe {
             nextConsumer.consume(current);
         } else if (mNextConsumer != null) {
             mNextConsumer.add(nextConsumer);
-        } else {
+        } else if (mLightSensor != null) {
             mDestroyed = false;
             mNextConsumer = nextConsumer;
             enableLightSensorLoggingLocked();
+        } else {
+            Slog.w(TAG, "No light sensor - use current to consume");
+            nextConsumer.consume(current);
         }
     }
 
     private void enableLightSensorLoggingLocked() {
-        if (!mEnabled) {
+        if (!mEnabled && mLightSensor != null) {
             mEnabled = true;
             mLastAmbientLux = -1;
             mSensorManager.registerListener(mLightSensorListener, mLightSensor,
@@ -201,7 +204,7 @@ final class ALSProbe implements Probe {
     private void disableLightSensorLoggingLocked(boolean destroying) {
         resetTimerLocked(false /* start */);
 
-        if (mEnabled) {
+        if (mEnabled && mLightSensor != null) {
             mEnabled = false;
             if (!destroying) {
                 mLastAmbientLux = -1;
diff --git a/services/tests/servicestests/src/com/android/server/biometrics/log/ALSProbeTest.java b/services/tests/servicestests/src/com/android/server/biometrics/log/ALSProbeTest.java
index bb0063427339..fa1fd90e10c9 100644
--- a/services/tests/servicestests/src/com/android/server/biometrics/log/ALSProbeTest.java
+++ b/services/tests/servicestests/src/com/android/server/biometrics/log/ALSProbeTest.java
@@ -344,6 +344,21 @@ public class ALSProbeTest {
         verifyNoMoreInteractions(mSensorManager);
     }
 
+    @Test
+    public void testAwaitLuxWhenNoLightSensor() {
+        when(mSensorManager.getDefaultSensor(Sensor.TYPE_LIGHT)).thenReturn(null);
+        mProbe = new ALSProbe(mSensorManager, new Handler(mLooper.getLooper()), TIMEOUT_MS - 1);
+
+        AtomicInteger lux = new AtomicInteger(-5);
+        mProbe.awaitNextLux((v) -> lux.set(Math.round(v)), null /* handler */);
+
+        // Verify that no light sensor will be registered.
+        verify(mSensorManager, times(0)).registerListener(
+                mSensorEventListenerCaptor.capture(), any(), anyInt());
+
+        assertThat(lux.get()).isEqualTo(-1);
+    }
+
     private void moveTimeBy(long millis) {
         mLooper.moveTimeForward(millis);
         mLooper.processAllMessages();