Android 7 Bluetooth intermittent disconnecting Android 7 phone once paired with earphones or car headset disconnects and reconnect, causing annoying drops in music play
Go to Location settings, put mode in Battery saving mode. This helps with battery drain. Then press the 3-dots -> select Scanning -> disable Bluetooth scanning and also disable WiFi scanning.  
Go to Battery -> click 3-dots -> Optimization. Select All apps, then don't optimize BT tool.