procinfo: Read inode number from /proc/<pid>/maps

Adjust all callbacks to include the inode number as well.

Fixes: 123532375
Test: libprocinfo_test
Test: libdmabufinfo_test
Test: libmeminfo_test

Change-Id: I71fd75d90d5ee44585011c5ae654a1dd7e185458
Signed-off-by: Sandeep Patil <sspatil@google.com>