Clarify documentation for TelMan#iccOpenLogicalChannel.

TelephonyManager#iccOpenLogicalChannel documentation should be improved
to clarify the function and its inputs. Relevant standards are also
explicitly referenced.

Bug: 129555815
Test: Only documentation is changed. Tests not affected.
Change-Id: I0664572c83cde480a9ac5f39d8664723b9ac81c9