Changes

pySim/commands: Fix envelope command APDU case after T=1 support

When we merged I8b56d7804a2b4c392f43f8540e0b6e70001a8970 for T=1
support, the ENVELOPE C-APDU was not adjusted to reflect the correct
case.  ENVELOPE expects a response and hence needs a Le byte present.

This avoids below related message when performing e.g. OTA via SMS

  Warning: received unexpected response data, incorrect APDU-case (3, should be 4, missing Le field?)!

Change-Id: Ice12675e02aa5438cf9f069f8fcc296c64aabc5a
Related: OS#6367

[cosmetic] pySim.transport: Fix spelling/typos in comment

Change-Id: Ia20cc2439bf00c1b6479f36c05514945ac4faf71

saip-tool: add function to write PE sequence

To prevent code duplication and to make the implementation simpler,
let's add a function that takes care of writing the PE sequnece
to an output file.

Change-Id: I38733422270f5b9c18187b7f247b84bf21f9121b

saip-tool: add option to extact profile elements to file

In some cases it may be helpful to extract a single profile element
from the sequence to a dedicated file.

Change-Id: I77a80bfaf8970660a84fa61f7e08f404ffc4c2da

saip-tool: allow removing of profile elements by type

At the moment it is only possible to remove profile elements by their identification
number. However, there may be cases where we want to remove all profile elements of
a certain type at once (e.g. when removing all applications).

Change-Id: I92f9f9d5b4382242963f1b3ded814a0d013c4808