BLE: Improve ArrayView documentation.
BLE: Improve ArrayView documentation.

- Improve detailed description of the class.
- Add undefined params tparams and return documentation.
- Add pre and postcondition when valuable.
- Put the elements of the file in the ble.common group.

c1728p9/mbed-os,CalSol/mbed,mazimkhan/mbed-os,betzw/mbed-os,kjbracey-arm/mbed,karsev/mbed-os,kjbracey-arm/mbed,betzw/mbed-os,ryankurte/mbed-os,mazimkhan/mbed-os,Archcady/mbed-os,CalSol/mbed,ryankurte/mbed-os,ryankurte/mbed-os,kjbracey-arm/mbed,mbedmicro/mbed,CalSol/mbed,karsev/mbed-os,mazimkhan/mbed-os,Archcady/mbed-os,c1728p9/mbed-os,c1728p9/mbed-os,betzw/mbed-os,kjbracey-arm/mbed,mbedmicro/mbed,andcor02/mbed-os,betzw/mbed-os,Archcady/mbed-os,c1728p9/mbed-os,c1728p9/mbed-os,andcor02/mbed-os,CalSol/mbed,andcor02/mbed-os,karsev/mbed-os,karsev/mbed-os,andcor02/mbed-os,Archcady/mbed-os,ryankurte/mbed-os,mbedmicro/mbed,Archcady/mbed-os,mbedmicro/mbed,mazimkhan/mbed-os,ryankurte/mbed-os,mazimkhan/mbed-os,andcor02/mbed-os,betzw/mbed-os,c1728p9/mbed-os,andcor02/mbed-os,mazimkhan/mbed-os,mbedmicro/mbed,CalSol/mbed,ryankurte/mbed-os,betzw/mbed-os,karsev/mbed-os,CalSol/mbed,Archcady/mbed-os,karsev/mbed-os