[LSC] Add LOCAL_LICENSE_KINDS to device/sample

Added SPDX-license-identifier-Apache-2.0 to:
  apps/SampleEmailPolicy/Android.mk
  apps/client/Android.mk
  apps/tv/LeanbackCustomizer/Android.mk
  apps/upgrade/Android.mk

Added legacy_notice to:
  apps/tv/LeanbackWidget/Android.mk

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I7fc726603dcd4de560437f51300b3d2d2ead9c0f