[LSC] Add LOCAL_LICENSE_KINDS to packages/apps/Launcher3

Added SPDX-license-identifier-Apache-2.0 to:
  tests/dummy_app/Android.mk

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: Iea957fe3cfc434246acfe19eb7917fbe22079cde