fix -Wmissing-field-initializers warnings

Clang's -Wmissing-field-initializers now complains about missing
initializers in structs init'ed using `.designators`. Fix up about 100
instances of this.

BUG=b:305723283
TEST=FEATURES=test emerge-hana

Change-Id: Ida87c19428aebdeee94eaf4a95f2339f8d0e63d7
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/5014383
Commit-Queue: Henry Barnor <hbarnor@chromium.org>
Reviewed-by: Henry Barnor <hbarnor@chromium.org>
Tested-by: George Burgess <gbiv@chromium.org>
Code-Coverage: Henry Barnor <hbarnor@chromium.org>
19 files changed