USB: android.c: Stop data xfers and disable endpoints before pullup disable

Current code is doing disable pullup before disable endpoints whenever
USB composition switch happens. But as per synopsys data book, it requires
to stop data transfers and disable endpoints before disabling pullup for
composition switch. Hence change the sequence as per databook.

CRs-Fixed: 965207
Change-Id: Iae1ba0c2322883739a2fb85969b73258a41461ca
Signed-off-by: Vijayavardhan Vennapusa <vvreddy@codeaurora.org>