Added javax.lang.model.element.Modifier to jre_core, to support an ErrorProne update.
Added javax.lang.model.element.Modifier to jre_core, to support an ErrorProne update.

PiperOrigin-RevId: 375758651

mirego/j2objc,google/j2objc,google/j2objc,groschovskiy/j2objc,google/j2objc,google/j2objc,mirego/j2objc,groschovskiy/j2objc,google/j2objc,groschovskiy/j2objc,mirego/j2objc,google/j2objc,groschovskiy/j2objc,mirego/j2objc,mirego/j2objc,mirego/j2objc,groschovskiy/j2objc,groschovskiy/j2objc