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android/handsfree: Delay SCO connection after codec negotiation
If SCO connection is created in same interation as OK response to
AT+BCC it may happen that SCO will connect before OK is send. Some
headset units don't handle this and reject SCO connection.
To fix that we delay SCO connection into next mainloop iteration.
Issue found on UPF49.
> ACL Data RX: Handle 2 flags 0x02 dlen 15 [hci0] 2572.477715
Channel: 66 len 11 [PSM 23 mode 0] {chan 2}
19 ef 0f 41 54 2b 42 43 43 0d 55 ...AT+BCC.U
< HCI Command: Setup Synchronous Co.. (0x01|0x0028) plen 17 [hci0] 2572.482384
Handle: 2
Transmit bandwidth: 8000
Receive bandwidth: 8000
Max latency: 13
Setting: 0x0003
Input Coding: Linear
Input Data Format: 1's complement
Input Sample Size: 8-bit
# of bits padding at MSB: 0
Air Coding Format: Transparent Data
Retransmission effort: Optimize for link quality (0x02)
Packet type: 0x0380
3-EV3 may not be used
2-EV5 may not be used
3-EV5 may not be used
> HCI Event: Command Status (0x0f) plen 4 [hci0] 2572.482903
Setup Synchronous Connection (0x01|0x0028) ncmd 1
Status: Success (0x00)
< ACL Data TX: Handle 2 flags 0x00 dlen 14 [hci0] 2572.490198
Channel: 6978 len 10 [PSM 3 mode 0] {chan 9}
1b ef 0d 0d 0a 4f 4b 0d 0a 8f .....OK...
> HCI Event: Number of Completed Packets (0x13) plen 5 [hci0] 2572.493311
Num handles: 1
Handle: 2
Count: 1
> HCI Event: Synchronous Connect Complete (0x2c) plen 17 [hci0] 2572.494013
Status: Connection Rejected due to Unacceptable BD_ADDR (0x0f)
Handle: 4
Address: 20:68:9D:30:7B:9F (Liteon Technology Corporation)
Link type: eSCO (0x02)
Transmission interval: 0x00
Retransmission window: 0x00
RX packet length: 0
TX packet length: 0
Air mode: CVSD (0x02)