Merge "Improve documentation of the enabled property"

type commonProperties struct {

	// emit build rules for this module

	//

	// Disabling a module should only be done for those modules that cannot be built

	// in the current environment. Modules that can build in the current environment

	// but are not usually required (e.g. superceded by a prebuilt) should not be

	// disabled as that will prevent them from being built by the checkbuild target

	// and so prevent early detection of changes that have broken those modules.

	Enabled *bool `android:"arch_variant"`

	// Controls the visibility of this module to other modules. Allowable values are one or more of