[LSC] Add LOCAL_LICENSE_KINDS to packages/apps/WallpaperPicker

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

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I1ce95601b3a82a78ca48169ec9c033199267d7e4
1 file changed