extract_utils: fix extraction of alternate partitions

The current code checks if partition is in list of normal partitions
before deciding whether to extract it using normal route or firmware
route.

If you want to extract system_ext, but system_ext is not a separate
partition, and it's contained inside system, after trying to extract
system_ext, code will pick system as an alternate partition for
system_ext. Normal partitions will not contain system because we're
either only trying to extract system_ext or because we don't extract
any blob from system so firmware route will be picked, failing to
extract it.

Firmware partitions have no alternate partitions, so flip the condition.

Change-Id: I3b3a65495d8b136a6163d0caee59f9b482bffe2c

Author: Demon000

extract_utils/extract.py

@@ -539,10 +539,10 @@ def extract_all_partitions(dump_dir: str, ctx: ExtractCtx):
     while partitions:
         with ProcessPoolExecutor() as exe:
             for partition in partitions:
-                if partition in normal_partitions:
-                    fn = extract_partition
-                else:
+                if partition in firmware_partitions:
                     fn = extract_firmware_partition
+                else:
+                    fn = extract_partition
 
                 exe.submit(fn, partition, dump_dir)