Merge changes Iefadc1a6,I13a7bc20,I49a97a75,I33ae5c6f,I5ebdc84e, ... into p9.0

* changes:
  Disable dataroaming by default
  fs_config: Allow targets to override OEM AID restrictions
  dexopt: Only dexopt boot and system server for non-user builds
  Don't enable ADB by default on userdebug builds
  build: Separate commands in recovery foreach loops
  build: recovery: Support adding device-specific items
  build: Make systemimage depend on installed kernel if system is root
  kernel: Allow building dtbo.img
  Edify: Add abort message for bootloader asserts
  releasetools: squash backuptool support
  build: ota: Support for install tools in /tmp/install
tree: e3ccab3259a5f5539d98119b1c93be0b2aeb2624
  1. core/
  2. target/
  3. tests/
  4. tools/
  5. .gitignore
  6. .gitreview
  7. Android.mk
  8. buildspec.mk.default
  9. Changes.md
  10. CleanSpec.mk
  11. envsetup.sh
  12. help.sh
  13. navbar.md
  14. OWNERS
  15. README.md
  16. tapasHelp.sh
  17. 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For an outdated reference on Android.mk files, see build-system.html.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.