Merge "Deprecate TARGET_BUILD_APPS=all" into main

ifneq ($(TARGET_BUILD_APPS),)

  # If this build is just for apps, only build apps and not the full system by default.

  ifneq ($(filter all,$(TARGET_BUILD_APPS)),)

    # If they used the magic goal "all" then build all apps in the source tree.

    unbundled_build_modules := $(foreach m,$(sort $(ALL_MODULES)),$(if $(filter APPS,$(ALL_MODULES.$(m).CLASS)),$(m)))

    # The magic goal "all" used to build all apps in the source tree. This was deprecated

    # so that we can know all TARGET_BUILD_APPS apps are built with soong for soong-only builds.

    $(error TARGET_BUILD_APPS=all is deprecated)

  else

    unbundled_build_modules := $(sort $(TARGET_BUILD_APPS))

  endif