[LSC] Add LOCAL_LICENSE_KINDS to system/apex

Added SPDX-license-identifier-Apache-2.0 to:
  Android.bp
  apexd/Android.bp
  apexd/apexd_testdata/Android.bp
  apexd/sysprop/Android.bp
  apexer/Android.bp
  apexer/testdata/Android.bp
  libs/libapexutil/Android.bp
  proto/Android.bp
  shim/Android.bp
  shim/build/Android.bp
  tests/Android.bp
  tests/testdata/sharedlibs/build/Android.bp
  tests/testdata/sharedlibs/build/com.android.apex.test.bar/Android.bp
  tests/testdata/sharedlibs/build/com.android.apex.test.baz/Android.bp
  tests/testdata/sharedlibs/build/com.android.apex.test.foo/Android.bp
  tests/testdata/sharedlibs/build/com.android.apex.test.pony/Android.bp
  tests/testdata/sharedlibs/build/com.android.apex.test.sharedlibs/Android.bp
  tests/testdata/sharedlibs/build/com.android.apex.test.sharedlibs_secondary/Android.bp
  tests/testdata/sharedlibs/prebuilts/Android.bp
  tools/Android.bp

Bug: 68860345
Bug: 151177513
Bug: 151953481

Test: m all

Exempt-From-Owner-Approval: janitorial work
Change-Id: I3729fc3855c83ca0a4866d55d3a7925cb7815419
20 files changed