[Mediacontroller] Added flags for setting shuffle and repeat modes

[Mediacontroller] Added flags for setting shuffle and repeat modes

shuffle_mode_ and repeat_mode_ initial values are not determined.
Added flags enables to determine if it was already set.
Without it following TCT cases failed regardles of initial value:
MediaControllerPlaybackInfoChangeCallback_onrepeatmodechanged
MediaControllerPlaybackInfoChangeCallback_onshufflemodechanged
when run second time on target device.
First run might result in success as well as in block.

Verification: TCT pass rate: 100%

Change-Id: I71ef1a8ab4f7c86bb6f9adc9b05fc6f192bd0d96
Signed-off-by: Arkadiusz Pietraszek <a.pietraszek@partner.samsung.com>