Merge "installd: add missing <functional> for std::function." into main am: a6ec7859

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2673909



Change-Id: I3def094635d6b57123db5094a38f2cc32b4f2adc
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>