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

boot/config.txt

@@ -0,0 +1,45 @@
+# Kernel
+arm_64bit=1
+kernel=Image
+
+# Ramdisk
+initramfs ramdisk.img followkernel
+
+# Audio
+dtparam=audio=on
+
+# Camera
+camera_auto_detect=1
+start_x=1
+
+# Display
+disable_overscan=1
+
+# Display panel
+#dtoverlay=vc4-kms-dsi-7inch
+#dtoverlay=rpi-backlight
+
+# Graphics acceleration
+dtoverlay=vc4-kms-v3d
+dtoverlay=cma,cma-384
+
+# I2C
+#dtparam=i2c_arm=on
+
+# I2S
+#dtparam=i2s=on
+
+# Serial console
+enable_uart=1
+
+# SPI
+#dtparam=spi=on
+
+# USB
+dtoverlay=dwc2,dr_mode=peripheral
+[cm4]
+dtoverlay=dwc2,dr_mode=otg
+[all]
+
+# V4L2
+#dtoverlay=rpivid-v4l2