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

vendor.prop

@@ -0,0 +1,42 @@
+
+# Audio
+persist.audio.pcm.card=0
+persist.audio.pcm.device=0
+ro.config.media_vol_default=20
+ro.config.media_vol_steps=25
+
+# Bluetooth
+ro.rfkilldisabled=1
+
+# Camera
+media.settings.xml=/vendor/etc/media_profiles_V1_0.xml
+ro.hardware.camera=libcamera
+
+# Display
+debug.drm.mode.force=1920x1080
+
+# Graphics
+ro.hardware.hwcomposer=drm
+ro.hardware.vulkan=broadcom
+ro.opengles.version=196609
+
+# LMKD
+ro.lmk.critical=0
+ro.lmk.critical_upgrade=false
+ro.lmk.downgrade_pressure=100
+ro.lmk.kill_heaviest_task=true
+ro.lmk.kill_timeout_ms=100
+ro.lmk.log_stats=true
+ro.lmk.low=1001
+ro.lmk.medium=800
+ro.lmk.upgrade_pressure=100
+ro.lmk.use_minfree_levels=true
+
+# V4L2
+debug.stagefright.c2-poolmask=0xf50000
+ro.vendor.v4l2_codec2.decode_concurrent_instances=8
+ro.vendor.v4l2_codec2.encode_concurrent_instances=8
+
+# Wifi
+wifi.interface=wlan0
+