aapt2: Ensure shortened paths are not reserved in Windows

It is possible that the shortened resource path is a reserved name in
Windows (see:
https://learn.microsoft.com/en-us/windows/win32/fileio/naming-a-file).
We rename the path to something that is guaranteed to be NOT reserved.

Bug: 276340505
Test: atest aapt2_tests
Change-Id: Ibc20f10e2e98755a18190a1ba51e0019dd5c1ba0