Reduce the delay during headset removal

AudioService currently waits for one second delay for device switch
after headset removal. This is to avoid any fake interrupts during
removal. But, codec already waits for fake interrupts before actually
triggering the removal interrupt. So, the delay is more during
device switch from headset to speaker. Change reduces the delay
by 300msec in AudioService as codec is handling the fake removal
interrupts.

Change-Id: I9d5dc1a82b85c0be8aaef3b65286450dfed13d35