[FM] Unable to save recorded audio from FM radio when a channel has a very long name

    Launch FM app and search for FM channels -> Add one of
    the channels to Favorite and rename the channel with a
    long name (60 characters or more) -> Now play the renamed
    channel and start recording the audio, stop recording and
    tap on the save button on the pop up to save the audio ->
    Start recording the audio again from the same channel, stop
    recording and tap on the save button on the pop up to save
    the audio, "<audio file name> already exists" and audio is
    not saved.

    The CL is to limit the maximum length for renaming a station
    and fix the layout issue when the station name is too long.

    Bug 18844225

    Review: https://partner-android-review.git.corp.google.com/#/c/192386



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

Change-Id: I30eb19497e3181efe5143a39b84d9c25c3ee37a6