DoH: Send pending data out right after handle a buffered DNS request am:...

DoH: Send pending data out right after handle a buffered DNS request am: 607f74e7 am: fa750b53 am: 8af104d2 am: d9e65d0b am: 73635aa8

Original change: https://android-review.googlesource.com/c/platform/packages/modules/DnsResolver/+/2617069



Change-Id: Ic2c473db7b996f96e896c017d1b1904c9e0fbc46
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>