SoundRecorder: Make pointer back to initial position.

When click the done button or discard button,the mVUMeter
is not reset to original space which make this bug happen

Add sentence to make mVUMeter reset to original space
when click done or discard button.

CRs-fixed: 646258

Change-Id: Ic00ea5618887924883889039e95449e51ae217d5
SoundRecorder: Fix getSDPath() returns unexpected volume.

getSDPath() fails to return expected SD card path since UICC storage is
added and owns the some mount attributions as SD card volume. Add extra
judgement to ensure SD card path is returned.

Change-Id: I5bcf008976dc698df008db247bfbf26c4580075f
CRs-Fixed: 646483
SoundRecorder: Fix menu item not display gray.

When we press home key,we only stop the Recorder,but
not reset it state.

When we stop Recorder,reset recorder stop state.

CRs-fixed: 652861

Change-Id: Id1c25a01227322e507187f58cb754c0e1d68bb72