Support custom payload signer in merge_ota

Add options to handle custom payload signer as it is required in
merge_ota.py as well if the original OTA packages are signed by
the signer.

If input is only one OTA, clone apex_info.pb to the target.

Use common.ZipWriteStr instead of zipfile.writestr, this ensures
that the same permission for the entries as done by
ota_from_target_files.

Bug: 282189563
Test: manual. pass single OTA to merge_ota, with same signing
    parameters as originally used. Confirm that output zip is
    binary identical to input.
(cherry picked from https://android-review.googlesource.com/q/commit:1f93ce20c5a5f3e7c2f6b5e1f9fdc4d2572220cc)
Merged-In: I3b926b8cd69bc74dff6ccf8b5ccc72bedffcac6f
Change-Id: I3b926b8cd69bc74dff6ccf8b5ccc72bedffcac6f
2 files changed
tree: 96a243553a03af0e64bdaeea703dadbdd97526ce
  1. common/
  2. core/
  3. packaging/
  4. target/
  5. tests/
  6. tools/
  7. .gitignore
  8. banchanHelp.sh
  9. buildspec.mk.default
  10. Changes.md
  11. CleanSpec.mk
  12. Deprecation.md
  13. envsetup.sh
  14. help.sh
  15. METADATA
  16. navbar.md
  17. OWNERS
  18. PREUPLOAD.cfg
  19. rbesetup.sh
  20. README.md
  21. shell_utils.sh
  22. tapasHelp.sh
  23. Usage.txt
README.md

Android Make Build System

This is the Makefile-based portion of the Android Build System.

For documentation on how to run a build, see Usage.txt

For a list of behavioral changes useful for Android.mk writers see Changes.md

For an outdated reference on Android.mk files, see build-system.html. Our Android.mk files look similar, but are entirely different from the Android.mk files used by the NDK build system. When searching for documentation elsewhere, ensure that it is for the platform build system -- most are not.

This Makefile-based system is in the process of being replaced with Soong, a new build system written in Go. During the transition, all of these makefiles are read by Kati, and generate a ninja file instead of being executed directly. That's combined with a ninja file read by Soong so that the build graph of the two systems can be combined and run as one.