usb: android: Stop controller before disabling endpoints for USB2

DWC3 controller requires stopping the controller only after removing
the config that disables EPs as well. As this sequence is not recommended
for chipidea USB2 controller, change it accordingly.

Change-Id: I27f805fdf079710adf9149004bd3fc03aed91a88
Signed-off-by: Chandana Kishori Chiluveru <cchiluve@codeaurora.org>