Only assert-max-image-size for static partitions.

assert-max-image-size doesn't make sense for
dynamic partitions, as build_image.py always find the
right size for the output image. Hence:

- build_image.py no longer need to write generated_*_info.txt
  (which contains the size of the image).
- assert-max-image-size on the static BOARD_*IMAGE_PARTITION_SIZE. If
  a partition is dynamic, that variable isn't set, and
  assert-max-image-size becomes a no-op. If the partition is static,
  assert-max-image-size checks the static partition size as it used
  to be.
- Fix read-size-of-partitions to use the size of the partition by
  reading the image directly (instead of using generated_*_info.txt).

For devices without AVB, with DAP enabled, and does not have
RESERVED_SIZE for partitions, because of right sizing, the original
code always warns about approaching size limits. Since such checks
doesn't make sense for dynamic partitions, remove them.

Test: builds on device with dynamic partitions
Test: builds on cuttlefish with DAP enabled (without AVB), no
      more size limit warnings:
WARNING: out/target/product/vsoc_x86/vendor.img approaching size limit (X now; limit X)

Fixes: 122377935
Change-Id: I75e1b8322197cb18cf397d02aefd49d777bb6405

tools/releasetools/build_image.py

@@ -18,10 +18,8 @@
 Builds output_image from the given input_directory, properties_file,
 and writes the image to target_output_directory.
 
-If argument generated_prop_file exists, write additional properties to the file.
-
 Usage:  build_image.py input_directory properties_file output_image \\
-            target_output_directory [generated_prop_file]
+            target_output_directory
 """
 
 from __future__ import print_function
@@ -735,13 +733,8 @@ def GlobalDictFromImageProp(image_prop, mount_point):
   return d
 
 
-def SaveGlobalDict(filename, glob_dict):
-  with open(filename, "w") as f:
-    f.writelines(["%s=%s" % (key, value) for (key, value) in glob_dict.items()])
-
-
 def main(argv):
-  if len(argv) < 4 or len(argv) > 5:
+  if len(argv) != 4:
     print(__doc__)
     sys.exit(1)
 
@@ -751,7 +744,6 @@ def main(argv):
   glob_dict_file = argv[1]
   out_file = argv[2]
   target_out = argv[3]
-  prop_file_out = argv[4] if len(argv) >= 5 else None
 
   glob_dict = LoadGlobalDict(glob_dict_file)
   if "mount_point" in glob_dict:
@@ -791,10 +783,6 @@ def main(argv):
     logger.error("Failed to build %s from %s", out_file, in_dir)
     raise
 
-  if prop_file_out:
-    glob_dict_out = GlobalDictFromImageProp(image_properties, mount_point)
-    SaveGlobalDict(prop_file_out, glob_dict_out)
-
 
 if __name__ == '__main__':
   try: