Bluetooth: RFCOMM: Handle session disconnection from peer
Bluetooth: RFCOMM: Handle session disconnection from peer

UA response will be sent and session will be cleaned up.
Session will also be cleaned up if l2cap channel is disconnected.

> ACL Data RX: Handle 256 flags 0x02 dlen 8
      Channel: 64 len 4 [PSM 3 mode 0] {chan 0}
      RFCOMM: Disconnect (DISC) (0x43)
         Address: 0x03 cr 1 dlci 0x00
         Control: 0x53 poll/final 1
         Length: 0
         FCS: 0xfd

< ACL Data TX: Handle 256 flags 0x00 dlen 8
      Channel: 64 len 4 [PSM 3 mode 0] {chan 0}
      RFCOMM: Unnumbered Ack (UA) (0x63)
         Address: 0x03 cr 1 dlci 0x00
         Control: 0x73 poll/final 1
         Length: 0
         FCS: 0xd7

Change-Id: I44997d7d13c90a2a0814520ea11e6f14bc60271f
Signed-off-by: Jaganath Kanakkassery <cdeedb43633a09d3dc68b67af94002f918d6c778@intel.com>

mbolivar/zephyr,explora26/zephyr,fractalclone/zephyr-riscv,finikorg/zephyr,rsalveti/zephyr,punitvara/zephyr,zephyrproject-rtos/zephyr,explora26/zephyr,zephyriot/zephyr,holtmann/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,fractalclone/zephyr-riscv,explora26/zephyr,explora26/zephyr,punitvara/zephyr,pklazy/zephyr,tidyjiang8/zephyr-doc,bigdinotech/zephyr,bigdinotech/zephyr,bboozzoo/zephyr,galak/zephyr,kraj/zephyr,aceofall/zephyr-iotos,erwango/zephyr,aceofall/zephyr-iotos,aceofall/zephyr-iotos,nashif/zephyr,erwango/zephyr,pklazy/zephyr,tidyjiang8/zephyr-doc,zephyriot/zephyr,sharronliu/zephyr,sharronliu/zephyr,pklazy/zephyr,bigdinotech/zephyr,bboozzoo/zephyr,finikorg/zephyr,mbolivar/zephyr,runchip/zephyr-cc3200,explora26/zephyr,nashif/zephyr,erwango/zephyr,runchip/zephyr-cc3200,mbolivar/zephyr,bboozzoo/zephyr,fbsder/zephyr,nashif/zephyr,runchip/zephyr-cc3200,holtmann/zephyr,bboozzoo/zephyr,zephyrproject-rtos/zephyr,rsalveti/zephyr,zephyrproject-rtos/zephyr,punitvara/zephyr,runchip/zephyr-cc3200,rsalveti/zephyr,fbsder/zephyr,rsalveti/zephyr,GiulianoFranchetto/zephyr,zephyriot/zephyr,tidyjiang8/zephyr-doc,punitvara/zephyr,galak/zephyr,kraj/zephyr,mbolivar/zephyr,runchip/zephyr-cc3220,kraj/zephyr,sharronliu/zephyr,galak/zephyr,runchip/zephyr-cc3220,nashif/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,nashif/zephyr,Vudentz/zephyr,sharronliu/zephyr,mbolivar/zephyr,fractalclone/zephyr-riscv,rsalveti/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,pklazy/zephyr,zephyriot/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,fractalclone/zephyr-riscv,finikorg/zephyr,zephyriot/zephyr,GiulianoFranchetto/zephyr,runchip/zephyr-cc3220,Vudentz/zephyr,ldts/zephyr,fbsder/zephyr,tidyjiang8/zephyr-doc,runchip/zephyr-cc3220,bigdinotech/zephyr,sharronliu/zephyr,ldts/zephyr,holtmann/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,fbsder/zephyr,punitvara/zephyr,aceofall/zephyr-iotos,fractalclone/zephyr-riscv,bigdinotech/zephyr,pklazy/zephyr,kraj/zephyr,tidyjiang8/zephyr-doc,holtmann/zephyr,fbsder/zephyr,Vudentz/zephyr,holtmann/zephyr,aceofall/zephyr-iotos,erwango/zephyr,kraj/zephyr,Vudentz/zephyr,runchip/zephyr-cc3220,ldts/zephyr,bboozzoo/zephyr,runchip/zephyr-cc3200,ldts/zephyr,erwango/zephyr,ldts/zephyr,Vudentz/zephyr