header-abi-dumper : start recording semantic information about function pointers.

Bug: 71486762

Test: tests/test.py

Test: Add function pointer argument to function in a translation unit;
      See it on translation unit's sdump file.

Merged-In: Ic1acd21cdc212f2809581ce1a3ec70aa28edbc7a
Change-Id: Ic1acd21cdc212f2809581ce1a3ec70aa28edbc7a
(cherry picked from commit 7fad8586)