Fix a crasher in SensorService

SensorService main thread wasn't java-enabled. however, in
some situations we end-up calling into the BatteryService from
that thread which causes a crash.

Change-Id: Iffba90e4c4b743dba84d62f1342001a9db31916d

services/sensorservice/SensorService.cpp

@@ -44,8 +44,7 @@ namespace android {
 // ---------------------------------------------------------------------------
 
 SensorService::SensorService()
-    : Thread(false),
-      mDump("android.permission.DUMP"),
+    : mDump("android.permission.DUMP"),
       mInitCheck(NO_INIT)
 {
 }