Merge "Revert "Enable mainline prebuilts on tm-dev branch."" into tm-dev

# Default behavior for the tree wrt building modules or using prebuilts. This

# can always be overridden by setting the environment variable

# MODULE_BUILD_FROM_SOURCE.

ifneq ($(SANITIZE_TARGET)$(EMMA_INSTRUMENT_FRAMEWORK),)

  # Always use sources when building the framework with Java coverage or

  # sanitized builds as they both require purpose built prebuilts which we do

  # not provide.

BRANCH_DEFAULT_MODULE_BUILD_FROM_SOURCE := true

else

  BRANCH_DEFAULT_MODULE_BUILD_FROM_SOURCE := false

endif

ifneq (,$(MODULE_BUILD_FROM_SOURCE))

  # Keep an explicit setting.