Remove dependency to distutils

Because distutils is deprecated since Python 3.10.

Test: atest android.security.cts.SELinuxHostTest
Change-Id: I29d390dcfbeaa65b2c868bbc8648835c644e3d18
diff --git a/tests/treble_sepolicy_tests.py b/tests/treble_sepolicy_tests.py
index a3bf661..64a9e95 100644
--- a/tests/treble_sepolicy_tests.py
+++ b/tests/treble_sepolicy_tests.py
@@ -20,9 +20,9 @@
 from policy import MatchPathPrefix
 import re
 import sys
-import distutils.ccompiler
 
 DEBUG=False
+SHARED_LIB_EXTENSION = '.dylib' if sys.platform == 'darwin' else '.so'
 
 '''
 Use file_contexts and policy to verify Treble requirements
@@ -375,7 +375,7 @@
                     parser.usage)
 
     libpath = os.path.join(os.path.dirname(os.path.realpath(__file__)),
-        "libsepolwrap" + distutils.ccompiler.new_compiler().shared_lib_extension)
+                           "libsepolwrap" + SHARED_LIB_EXTENSION)
     if not os.path.exists(libpath):
         sys.exit("Error: libsepolwrap does not exist. Is this binary corrupted?\n")