Deprecate legacy_android10_support

min_sdk_version: 29 implies that the module should support Android10.

Bug: 150431944
Test: m
Merged-In: Ic5be0f6cb21a2599f5cfe330278872fef65b6c62
Change-Id: Ic5be0f6cb21a2599f5cfe330278872fef65b6c62
(cherry picked from commit 18e14b269fed65ae83ac581e06b054745c3c04e1)

Exempt-From-Owner-Approval: cp from aosp
3 files changed