e2e: Upload one-time keys on /sync rather than a timer
e2e: Upload one-time keys on /sync rather than a timer

Make sure we upload one-time keys before doing the annoucement. Thus, other devices can download them once they receive our to-device annoucement event

matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk,matrix-org/matrix-ios-sdk