Revert "releasetools: Don't extract BOOTABLE_IMAGES when signing targ…

…et files"

sign_target_files_apks is currently dropping the content of
BOOTABLE_IMAGES. As consequence, the images are re-generated
without using custom mkbootimg makefiles, which can cause
issues on some devices with specific formats or requirements.

This reverts commit 71fbe14d8d2dbd3d8f7fd38ef5bb921fe5dfe68c.

Change-Id: If4c8c70ee32e21198859f594a2dc090abe2e13a1

tools/releasetools/sign_target_files_apks.py

@@ -217,9 +217,6 @@ def write_to_temp(fn, attr, data):
     if info.filename.startswith("IMAGES/"):
       continue
 
-    if info.filename.startswith("BOOTABLE_IMAGES/"):
-      continue
-
     data = input_tf_zip.read(info.filename)
     out_info = copy.copy(info)