Add a secondary launcher activity (1/2)

This secondary launcher activity with new category SECONDARY_HOME and
multiple instance supporrted could be used on sencondary display.

Bug: 118206886
Bug: 114329798
Test: Manual
Change-Id: Ibaecf8ef7614389760d0fcc547ef6d378a921583
diff --git a/SecondaryDisplayLauncher/Android.mk b/SecondaryDisplayLauncher/Android.mk
new file mode 100644
index 0000000..4fb5eba
--- /dev/null
+++ b/SecondaryDisplayLauncher/Android.mk
@@ -0,0 +1,39 @@
+#
+# Copyright (C) 2018 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.
+#
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+LOCAL_USE_AAPT2 := true
+LOCAL_AAPT2_ONLY := true
+LOCAL_MODULE_TAGS := optional
+
+LOCAL_STATIC_ANDROID_LIBRARIES := androidx.design_design
+
+LOCAL_STATIC_JAVA_LIBRARIES := LauncherPluginLib
+
+LOCAL_SRC_FILES := $(call all-java-files-under, src)
+
+LOCAL_RESOURCE_DIR := $(LOCAL_PATH)/res
+
+LOCAL_PROGUARD_ENABLED := disabled
+
+LOCAL_SDK_VERSION := current
+LOCAL_MIN_SDK_VERSION := 21
+LOCAL_MODULE := SecondaryDisplayLauncherLib
+LOCAL_PRIVILEGED_MODULE := true
+
+include $(BUILD_STATIC_JAVA_LIBRARY)