Add missing libc++ includes am: 27b3545620

Original change: https://android-review.googlesource.com/c/platform/frameworks/minikin/+/2902171

Change-Id: Icb1f1279f12f28c209cb61c87b9851fbe664f91b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>