Always move Bluetooth Adapter to cold state when turn off Bluetooth.

quick switch feature introduced in ICS does not work very well. Reported
logs indicate the Bluez stack cannot sustain the long time ON/hotoff state.
This change will always move the adapter to code but move it to hotoff
to be able to turn on quickly.
bug 5792792

Change-Id: I41c39d4bf11bb5eb3cd83279e8ec81e01774e008

Author: Matthew Xie

core/java/android/server/BluetoothAdapterStateMachine.java

@@ -441,9 +441,10 @@ public boolean processMessage(Message message) {
                         if (mPublicState == BluetoothAdapter.STATE_TURNING_OFF) {
                             transitionTo(mHotOff);
                             finishSwitchingOff();
-                            if (!mContext.getResources().getBoolean
-                            (com.android.internal.R.bool.config_bluetooth_adapter_quick_switch)) {
-                                deferMessage(obtainMessage(TURN_COLD));
+                            deferMessage(obtainMessage(TURN_COLD));
+                            if (mContext.getResources().getBoolean
+                                (com.android.internal.R.bool.config_bluetooth_adapter_quick_switch)) {
+                                deferMessage(obtainMessage(TURN_HOT));
                             }
                         }
                     } else {
@@ -612,9 +613,10 @@ public boolean processMessage(Message message) {
                     removeMessages(POWER_DOWN_TIMEOUT);
                     if (!((Boolean) message.obj)) {
                         transitionTo(mHotOff);
-                        if (!mContext.getResources().getBoolean
+                        deferMessage(obtainMessage(TURN_COLD));
+                        if (mContext.getResources().getBoolean
                             (com.android.internal.R.bool.config_bluetooth_adapter_quick_switch)) {
-                            deferMessage(obtainMessage(TURN_COLD));
+                            deferMessage(obtainMessage(TURN_HOT));
                         }
                     } else {
                         if (!isTurningOn) {