[LSC] Add LOCAL_LICENSE_KINDS to external/icing Added SPDX-license-identifier-Apache-2.0 to: Android.bp java/Android.bp java/tests/instrumentation/Android.bp proto/Android.bp Bug: 68860345 Bug: 151177513 Bug: 151953481 Test: m all Exempt-From-Owner-Approval: janitorial work Change-Id: I38c56024f1fabc5ea1cc471e8ba9328971051eee