[FM] "Getting stations" does not show when launching FM for the first time

    Launch FM and play a channel for the first time -> Tap Star icon
    to add the channel to Favorites and then tap Star icon to remove
    it -> Go to Radio Stations and check the view, "Getting stations"
    does not show, white view displays and then search channel
    successfully.

    Bug 19000983

    Review: https://partner-android-review.git.corp.google.com/#/c/193405



Signed-off-by: Benson Huang <benson.huang@mediatek.com>

Change-Id: I7b347a3430d3813f98241f370d32a56095d24d2b