Enable sensor data injection mode through adb.

Change-Id: I415cf8ff0871fa74babaf9b879c68f210298b472
diff --git a/libs/gui/SensorManager.cpp b/libs/gui/SensorManager.cpp
index 8c9f95b..dd37781 100644
--- a/libs/gui/SensorManager.cpp
+++ b/libs/gui/SensorManager.cpp
@@ -153,12 +153,12 @@
     return queue;
 }
 
-status_t SensorManager::enableDataInjection(bool enable) {
+bool SensorManager::isDataInjectionEnabled() {
     Mutex::Autolock _l(mLock);
     if (assertStateLocked() == NO_ERROR) {
-        return mSensorServer->enableDataInjection(enable);
+        return mSensorServer->isDataInjectionEnabled();
     }
-    return INVALID_OPERATION;
+    return false;
 }
 
 // ----------------------------------------------------------------------------