move android-specific feature files to android/

Change-Id: I1f2b345b1dfad544d53dbf7e17b12c75a2cc7668
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
iOS: Delete members in platform integration

Change-Id: Ibb1bf2bf4a1ced897172facbc9027402adfe6f08
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
iOS: Implement QPlatformServices to handle opening URLs

Change-Id: Ie644df16b919d6def1435dc5f3665ba3f62fb055
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>