Convert ShortcutLoader to Kotlin am: afe103dfcb

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/modules/IntentResolver/+/20615573

Change-Id: Ica2970a288bee706070ed24fcd2000a31db9bd73
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>