extract_utils: fix generated proprietary file extraction

Commit 71f352e
("extract_utils: skip parsing generated proprietary file when section is specified")
introduced skipping for generated proprietary files.

Generated proprietary files were stopped from being parsed if section
was set, causing file_list to be empty. This is okay when not
regenerating, or when regenerating from an existing dump, but when
regenerating from a fresh dump, file_list is only populated after
extraction, and the generated proprietary file's partition is needed on
extraction.

Move the generated proprietary file filtering to get_extract_partitions().

Change-Id: Id88fea9f882983cbe26c510540f1021d0bad3cbb

Author: Demon000

extract_utils/main.py

@@ -145,7 +145,7 @@ def run(self):
                 extract_fns.update(module.extract_fns)
 
                 extract_partitions.update(
-                    module.get_extract_partitions(),
+                    module.get_extract_partitions(self.__args.section),
                 )
                 firmware_partitions.update(
                     module.get_firmware_partitions(),

extract_utils/module.py

@@ -378,9 +378,6 @@ def regenerate(
         self.fix_file_list()
 
     def get_partitions(self) -> Set[str]:
-        if not self.file_list.all_files:
-            return set()
-
         return {self.partition}
 
 
@@ -452,10 +449,19 @@ def __init__(
         if not skip_main_proprietary_file:
             self.add_proprietary_file('proprietary-files.txt')
 
-    def get_partitions(self, kind: ProprietaryFileType):
+    def get_partitions(
+        self,
+        kind: ProprietaryFileType,
+        section: Optional[str] = None,
+    ):
         partitions: List[str] = []
 
         for proprietary_file in self.proprietary_files:
+            if section is not None and isinstance(
+                proprietary_file, GeneratedProprietaryFile
+            ):
+                continue
+
             if proprietary_file.kind is not kind:
                 continue
 
@@ -478,8 +484,8 @@ def get_files(self, kind: ProprietaryFileType):
 
         return files
 
-    def get_extract_partitions(self):
-        return self.get_partitions(ProprietaryFileType.BLOBS)
+    def get_extract_partitions(self, section: Optional[str]):
+        return self.get_partitions(ProprietaryFileType.BLOBS, section)
 
     def get_firmware_partitions(self):
         return self.get_partitions(ProprietaryFileType.FIRMWARE)
@@ -698,11 +704,6 @@ def parse(
         section: Optional[str],
     ):
         for proprietary_file in self.proprietary_files:
-            if section is not None and isinstance(
-                proprietary_file, GeneratedProprietaryFile
-            ):
-                continue
-
             if regenerate and isinstance(
                 proprietary_file,
                 GeneratedProprietaryFile,