Added SPDX-license-identifier-Apache-2.0 to:
quickstep/Android.bp
robolectric_tests/Android.bp
tests/Android.bp
Bug: 68860345
Bug: 151177513
Bug: 151953481
Test: m all
Exempt-From-Owner-Approval: janitorial work
Change-Id: I699e0796410f691ae7cf4802c41987d79e4e486d