Fix some python lint violations in aar-related tools

Unblocks lint-related problems in #18496.

PiperOrigin-RevId: 553886150
Change-Id: Ie7f5d369def2b5556fefe24e78e7a57d94921766

tools/android/aar_embedded_jars_extractor.py

@@ -45,6 +45,14 @@ def ExtractEmbeddedJars(aar,
                         singlejar_param_file,
                         output_dir,
                         output_dir_orig=None):
+  """Extracts all embedded jars from an AAR.
+
+  Args:
+    aar: The aar to extract from
+    singlejar_param_file: The param file to pass to singlejar
+    output_dir: Where to extract do
+    output_dir_orig: The original unshortened path to the params file
+  """
   if not output_dir_orig:
     output_dir_orig = output_dir
   jar_pattern = re.compile("^(classes|libs/.+)\\.jar$")

tools/android/aar_native_libs_zip_creator.py

@@ -41,18 +41,28 @@
 flags.mark_flag_as_required("output_zip")
 
 
-class UnsupportedArchitectureException(Exception):
+class UnsupportedArchitectureError(Exception):
   """Exception thrown when an AAR does not support the requested CPU."""
   pass
 
 
 def CreateNativeLibsZip(aar, cpu, native_libs_zip):
+  """Creates a zip containing native libs for the requested CPU.
+
+  Args:
+    aar: aar file to extract
+    cpu: The requested CPU architecture
+    native_libs_zip: The zip file to package native libs into.
+
+  Raises:
+    UnsupportedArchitectureError: CPU architecture is invalid.
+  """
   native_lib_pattern = re.compile("^jni/.+/.+\\.so$")
   if any(native_lib_pattern.match(filename) for filename in aar.namelist()):
     cpu_pattern = re.compile("^jni/" + cpu + "/.+\\.so$")
     libs = [name for name in aar.namelist() if cpu_pattern.match(name)]
     if not libs:
-      raise UnsupportedArchitectureException()
+      raise UnsupportedArchitectureError()
     for lib in libs:
       # Only replaces the first instance of jni, in case the AAR contains
       # something like /jni/x86/jni.so.
@@ -74,7 +84,7 @@ def Main(input_aar_path, output_zip_path, cpu, input_aar_path_for_error_msg):
     with zipfile.ZipFile(output_zip_path, "w") as native_libs_zip:
       try:
         CreateNativeLibsZip(input_aar, cpu, native_libs_zip)
-      except UnsupportedArchitectureException:
+      except UnsupportedArchitectureError:
         print("AAR " + input_aar_path_for_error_msg +
               " missing native libs for requested architecture: " +
               cpu)

tools/android/aar_native_libs_zip_creator_test.py

@@ -52,7 +52,7 @@ def testAarWithMissingLibs(self):
     aar.writestr("jni/armeabi/foo.so", "")
     outzip = zipfile.ZipFile(io.BytesIO(), "w")
     self.assertRaises(
-        aar_native_libs_zip_creator.UnsupportedArchitectureException,
+        aar_native_libs_zip_creator.UnsupportedArchitectureError,
         aar_native_libs_zip_creator.CreateNativeLibsZip,
         aar, "x86", outzip)