Ignore cleanup errors.

Certain binaries may have restrictive permissions.

BUG: 221492085
Test: TH
Change-Id: I56f3c172d9e2c3947e513bdf0b2072457061c547

tools/releasetools/apex_utils.py

@@ -214,7 +214,7 @@ class ApexApkSigner(object):
       if os.path.isfile(path):
         os.remove(path)
       elif os.path.isdir(path):
-        shutil.rmtree(path)
+        shutil.rmtree(path, ignore_errors=True)
 
     # TODO(xunchang) the signing process can be improved by using
     # '--unsigned_payload_only'. But we need to parse the vbmeta earlier for