UsbGadget: Add specific vendor function composition New vendor function composition: diag,serial_cdev,rmnet_gsi,dpl_gsi,qdss Bug: 141654033 Bug: 141667188 Test: Build pass Change-Id: Ib2719bb944ee9a7f87ad90c4e6649982a61988fe Signed-off-by: Kyle Tso <kyletso@google.com>