Show notification dialog to choose USBMS/MTP/PTP mode if primary sdcard allows mass storage

Change-Id: Ic24b6bfa462145881545812d558057ee319143b4
WebViewClassic does not support TEXT_AUTOSIZING layout mode

* Do nothing instead of throw an exception
* Fixes browser crash : http://review.cyanogenmod.org/#/c/58709/

Change-Id: Icb71d9c83b4a0dc2aed75a078ff064c16c4fb2fa