aconfig: introduce new aflags CLI

Add a new CLI binary that we can use as the officially recommended CLI
for reading and writing flags. For now, the CLI invokes commands to
interact with DeviceConfig and aconfig protos, but we will switch it to
interact with the forthcoming mmap-file-based aconfig storage. In the
meantime, we can add improved formatting and error reporting in a
separate layer.

This CL starts with the list command, which outputs a table of the
flags when you type `adb shell aflags list`.

Bug: 324436145
Test: atest aflags.test
Change-Id: Idd8aa78ccaace22a7e490014d410ad741f8f6fc6
7 files changed
tree: 07809fc1a10c8c4bffa375d4c4083d98c8c3c2db
  1. ci/
  2. common/
  3. core/
  4. packaging/
  5. target/
  6. teams/
  7. tests/
  8. tools/
  9. .gitignore
  10. banchanHelp.sh
  11. buildspec.mk.default
  12. Changes.md
  13. CleanSpec.mk
  14. cogsetup.sh
  15. Deprecation.md
  16. envsetup.sh
  17. help.sh
  18. METADATA
  19. navbar.md
  20. OWNERS
  21. PREUPLOAD.cfg
  22. rbesetup.sh
  23. README.md
  24. shell_utils.sh
  25. tapasHelp.sh
  26. 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For an outdated reference on Android.mk files, see build-system.html.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.