add android mk for akari and apollo devices

picked the template from twrp asus sm8250-common
https://github.com/TeamWin/android_device_asus_sm8250-common
android-12.1

Android.mk

@@ -0,0 +1,31 @@
+#
+# Copyright (C) 2017 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.
+#
+
+# This contains the module build definitions for the hardware-specific
+# components for this device.
+#
+# As much as possible, those components should be built unconditionally,
+# with device-specific names to avoid collisions, to avoid device-specific
+# bitrot and build breakages. Building a component unconditionally does
+# *not* include it on all devices, so it is safe even with hardware-specific
+# components.
+
+LOCAL_PATH := $(call my-dir)
+
+ifeq ($(TARGET_DEVICE),$(filter $(TARGET_DEVICE),akari apollo))
+    subdir_makefiles=$(call first-makefiles-under,$(LOCAL_PATH))
+    $(foreach mk,$(subdir_makefiles),$(info including $(mk) ...)$(eval include $(mk)))
+endif