Exercicio 13.11: Trabalhando com Broadcast Receivers
Exercicio 13.12: Trabalhando com Broadcast Receivers - Alterando a ordem de execucao dos Broadcast Receivers
Exercicio 13.13: Trabalhando com Broadcast Receivers - Compartilhando dados entre Broadcast Receivers
Exercicio 13.14: Trabalhando com Broadcast Receivers - Alterando dados propagados