Add more documentation for LE CoC

Added more information into Android SDK for LE Connection-oriented
Channels (CoC) so that it matches the corresponding RFComm
documentation.

Bug: 70683224
Test: Compile
Change-Id: I40abde70a7ca6bcd194ee75bd8367c0ed9e97d05
(cherry picked from commit bcbc1302)
Merged-In: I40abde70a7ca6bcd194ee75bd8367c0ed9e97d05