Expose errors for some of the SensorPrivacyManager calls

TODO: remove the overload when the call from AudioPolicyService is
removed.

Test: Build
Bug: 162549680
Change-Id: Idfc5079b9fe7802e492d8ed82c0514f2b36875f8
diff --git a/libs/sensorprivacy/SensorPrivacyManager.cpp b/libs/sensorprivacy/SensorPrivacyManager.cpp
index 7bddee6..4714469 100644
--- a/libs/sensorprivacy/SensorPrivacyManager.cpp
+++ b/libs/sensorprivacy/SensorPrivacyManager.cpp
@@ -64,13 +64,15 @@
     }
 }
 
-void SensorPrivacyManager::addIndividualSensorPrivacyListener(int userId, int sensor,
+status_t SensorPrivacyManager::addIndividualSensorPrivacyListener(int userId, int sensor,
         const sp<hardware::ISensorPrivacyListener>& listener)
 {
     sp<hardware::ISensorPrivacyManager> service = getService();
     if (service != nullptr) {
-        service->addIndividualSensorPrivacyListener(userId, sensor, listener);
+        return service->addIndividualSensorPrivacyListener(userId, sensor, listener)
+                .transactionError();
     }
+    return UNEXPECTED_NULL;
 }
 
 void SensorPrivacyManager::removeSensorPrivacyListener(
@@ -106,6 +108,19 @@
     return false;
 }
 
+status_t SensorPrivacyManager::isIndividualSensorPrivacyEnabled(int userId, int sensor,
+        bool &returnVal)
+{
+    sp<hardware::ISensorPrivacyManager> service = getService();
+    if (service != nullptr) {
+        binder::Status res = service->isIndividualSensorPrivacyEnabled(userId, sensor, &returnVal);
+        return res.transactionError();
+    }
+    // if the SensorPrivacyManager is not available then assume sensor privacy is disabled
+    returnVal = false;
+    return UNKNOWN_ERROR;
+}
+
 status_t SensorPrivacyManager::linkToDeath(const sp<IBinder::DeathRecipient>& recipient)
 {
     sp<hardware::ISensorPrivacyManager> service = getService();