Bind service in onCreate

This cl puts the binding to onCreate instead of constructor, so
preference controller won't bind/unbind service without registering
Lifecycle.

Bug: 62105045
Test: RunSettingsRoboTests
Change-Id: I1e60d4b6ad7270aa5d04b7ec9fae1d3200fccc5f

tests/robotests/src/com/android/settings/network/TetherPreferenceControllerTest.java

@@ -16,7 +16,6 @@
 
 package com.android.settings.network;
 
-
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothPan;
 import android.bluetooth.BluetoothProfile;
@@ -77,6 +76,14 @@ public class TetherPreferenceControllerTest {
         ReflectionHelpers.setField(mController, "mPreference", mPreference);
     }
 
+    @Test
+    public void lifeCycle_onCreate_shouldInitBluetoothPan() {
+        mController.onCreate(null);
+
+        verify(mBluetoothAdapter).getProfileProxy(mContext, mController.mBtProfileServiceListener,
+                BluetoothProfile.PAN);
+    }
+
     @Test
     public void goThroughLifecycle_shouldDestoryBluetoothProfile() {
         final BluetoothPan pan = mock(BluetoothPan.class);
@@ -161,7 +168,8 @@ public class TetherPreferenceControllerTest {
         mController.onResume();
 
         verify(mContext).registerReceiver(
-            any(TetherPreferenceController.TetherBroadcastReceiver.class), any(IntentFilter.class));
+                any(TetherPreferenceController.TetherBroadcastReceiver.class),
+                any(IntentFilter.class));
     }
 
     @Test
@@ -172,7 +180,7 @@ public class TetherPreferenceControllerTest {
         mController.onPause();
 
         verify(mContext).unregisterReceiver(
-            any(TetherPreferenceController.TetherBroadcastReceiver.class));
+                any(TetherPreferenceController.TetherBroadcastReceiver.class));
     }
 
     @Test