Add half sheet apk to nearby

Test: start activity show half sheet half sheet can also send signal
back to nearby service
Bug: 202335820

Change-Id: I663ad2ee43a0df35a063472af2835087719828c0
diff --git a/nearby/framework/Android.bp b/nearby/framework/Android.bp
index ba97112..1f1dac5 100644
--- a/nearby/framework/Android.bp
+++ b/nearby/framework/Android.bp
@@ -65,6 +65,7 @@
     installable: false,
     visibility: [
         "//packages/modules/Nearby/service",
+        "//packages/modules/Nearby/halfsheet",
         "//packages/modules/Nearby/tests",
     ],
 }
diff --git a/nearby/framework/java/android/nearby/IFastPairHalfSheetCallback.aidl b/nearby/framework/java/android/nearby/IFastPairHalfSheetCallback.aidl
new file mode 100644
index 0000000..43d31d1
--- /dev/null
+++ b/nearby/framework/java/android/nearby/IFastPairHalfSheetCallback.aidl
@@ -0,0 +1,24 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby;
+
+/**
+  * Provides callback interface for halfsheet to send FastPair call back.
+  *
+  * {@hide}
+  */
+interface IFastPairHalfSheetCallback {
+     void onHalfSheetConnectionConfirm();
+ }
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