initial Raspberry Vanilla AOSP 12 commit

* Audio
  - Based on AOSP hikey audio HAL:
    https://android.googlesource.com/device/linaro/hikey/+/refs/heads/master/audio/
  - ALSA based on Android-x86
  - ALSA loop is used to support HDMI audio on Pi 4 because VC4 HDMI
    audio devices use SNDRV_PCM_FORMAT_IEC958_SUBFRAME_LE that is not
    supported on Android
    https://github.com/raspberrypi/linux/issues/4651
    https://github.com/raspberrypi/linux/issues/4654

* Bluetooth
  - AOSP Broadcom vendor stack with some additional fixes from android-rpi

* Camera
  - libcamera for official Raspberry Pi CSI camera modules based on GloDroid
  - AOSP external camera HAL for UVC USB webcams:
    https://source.android.com/docs/core/camera/external-usb-cameras

* Graphics
  - OpenGL & Vulkan: upstream Mesa with GloDroid patches
  - Upstream drm_hwcomposer with force resolution patch from Android-x86 and
    my additional fixes
  - minigbm based on GloDroid

* Health
  - Based on AOSP cuttlefish health HAL

* Kernel
  - Merge of Raspberry Pi and AOSP common kernel with my additional fixes
    and configurations
    https://github.com/raspberrypi/linux
    https://android.googlesource.com/kernel/common/

* Lights
  - Based on LineageOS Xiaomi msm8996-common lights HAL

* suspend_blocker
  - Based on AOSP cuttlefish

* v4l2_codec2
  - Based on AOSP with my Raspberry Pi 4 specific fixes

* Wifi
  - AOSP Broadcom vendor stack with my additional fixes

BoardConfig.mk

@@ -0,0 +1,88 @@
+#
+# Copyright (C) 2021-2022 KonstaKANG
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+DEVICE_PATH := device/brcm/rpi4
+
+# Platform
+TARGET_NO_BOOTLOADER := true
+TARGET_NO_RECOVERY := true
+
+TARGET_BOARD_PLATFORM := rpi
+
+TARGET_ARCH := arm64
+TARGET_ARCH_VARIANT := armv8-a
+TARGET_CPU_ABI := arm64-v8a
+TARGET_CPU_ABI2 :=
+TARGET_CPU_VARIANT := cortex-a72
+
+TARGET_2ND_ARCH := arm
+TARGET_2ND_ARCH_VARIANT := armv7-a-neon
+TARGET_2ND_CPU_ABI := armeabi-v7a
+TARGET_2ND_CPU_ABI2 := armeabi
+TARGET_2ND_CPU_VARIANT := cortex-a72
+
+# Bluetooth
+BOARD_BLUETOOTH_BDROID_BUILDCFG_INCLUDE_DIR := $(DEVICE_PATH)/bluetooth
+BOARD_CUSTOM_BT_CONFIG := $(DEVICE_PATH)/bluetooth/vnd_rpi4.txt
+BOARD_HAVE_BLUETOOTH := true
+BOARD_HAVE_BLUETOOTH_BCM := true
+
+# Camera
+BOARD_LIBCAMERA_IPAS := raspberrypi
+BOARD_LIBCAMERA_PIPELINES := raspberrypi
+BOARD_LIBCAMERA_USES_MESON_BUILD := true
+
+# Display
+TARGET_SCREEN_DENSITY := 240
+
+# Graphics
+BOARD_MESA3D_USES_MESON_BUILD := true
+BOARD_MESA3D_GALLIUM_DRIVERS := vc4 v3d
+BOARD_MESA3D_VULKAN_DRIVERS := broadcom
+
+# Kernel
+BOARD_CUSTOM_BOOTIMG := true
+BOARD_CUSTOM_BOOTIMG_MK := $(DEVICE_PATH)/mkbootimg.mk
+BOARD_KERNEL_CMDLINE := console=ttyS0,115200 no_console_suspend root=/dev/ram0 rootwait androidboot.hardware=rpi4
+
+# Manifest
+DEVICE_MANIFEST_FILE := $(DEVICE_PATH)/manifest.xml
+DEVICE_MATRIX_FILE := $(DEVICE_PATH)/compatibility_matrix.xml
+
+# Media
+TARGET_ENABLE_MEDIADRM_64 := true
+
+# Partition sizes
+BOARD_FLASH_BLOCK_SIZE := 4096
+BOARD_BOOTIMAGE_PARTITION_SIZE := 134217728 # 128M
+BOARD_SYSTEMIMAGE_PARTITION_SIZE := 2147483648 # 2048M
+BOARD_USERDATAIMAGE_PARTITION_SIZE := 134217728 # 128M
+BOARD_VENDORIMAGE_PARTITION_SIZE := 268435456 # 256M
+BOARD_VENDORIMAGE_FILE_SYSTEM_TYPE := ext4
+TARGET_USERIMAGES_SPARSE_EXT_DISABLED := true
+TARGET_USERIMAGES_USE_EXT4 := true
+
+# Properties
+TARGET_VENDOR_PROP += $(DEVICE_PATH)/vendor.prop
+
+# SELinux
+BOARD_SEPOLICY_DIRS += device/brcm/rpi4/sepolicy
+BOARD_KERNEL_CMDLINE += androidboot.selinux=permissive
+
+# Treble
+BOARD_PROPERTY_OVERRIDES_SPLIT_ENABLED := true
+BOARD_VNDK_VERSION := current
+PRODUCT_FULL_TREBLE_OVERRIDE := true
+TARGET_COPY_OUT_VENDOR := vendor
+
+# Wifi
+BOARD_WLAN_DEVICE := bcmdhd
+BOARD_HOSTAPD_DRIVER := NL80211
+BOARD_HOSTAPD_PRIVATE_LIB := lib_driver_cmd_$(BOARD_WLAN_DEVICE)
+BOARD_WPA_SUPPLICANT_DRIVER := NL80211
+BOARD_WPA_SUPPLICANT_PRIVATE_LIB := lib_driver_cmd_$(BOARD_WLAN_DEVICE)
+WIFI_HIDL_UNIFIED_SUPPLICANT_SERVICE_RC_ENTRY := true
+WPA_SUPPLICANT_VERSION := VER_0_8_X