Firmware Update (v2.0) for Audition 3, fixed beeping every 15 seconds issue

Purpose of Update:  This firmware update addresses an issue where Avantree Audition 3 beeps every 15 seconds when paired with Oasis Plus/HT5009. 

Required Materials: Phone(don't do this on PC)

Step-by-Step Device Firmware Update (DFU) Guide:

Step 1: Download the DFU file to Android phone

File: AS19_V2.0(remember where you save this file, you will need it for Step 3)

Step 2: Connect Audition 3 Headphones to Your Phone

• From the off position, turn on the headphones, then hold the power switch to the "PAIR" position for about 5 seconds until the LED indicator alternates flashing RED & BLUE
• Select "Avantree AS19" from your phone's Bluetooth list

Step 3: Download & Install GAIA to Perform DFU

• Click and download the DFU APP GAIA Client V1.0.88 and install it on your phone.
• Open the GAIA APP and choose Avantree AS19 to pair 

• Click on it, then go to Settings-Software updates - SELECT UPGRADE FILE
• Wait for the file to be uploaded, when the pop-up window appears like the following, click "NOW"-"CONFIRM"-"DONE" accordingly, the firmware is now updated.
• Important Notice: Do not leave the page or disconnect the headphones while doing this.
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