Set android min sdk level to 23

Bug: NONE
Change-Id: I200178eeb52fc6a8748edbb87c643477e4e25ebd
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/404340
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Commit-Queue: Christoffer Dewerin <jansson@webrtc.org>
Reviewed-by: Tomas Gunnarsson <tommi@webrtc.org>
Reviewed-by: Zoé Lepaul <xalep@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#45337}