add thermal data source to poll temperatures

Add the "android.thermal" data source. Below is a sample config:

data_sources: {
  config {
    name: "android.thermal"
    android_thermal_config {
      poll_ms: 1000
      sensors: "BIG"
      sensors: "MID"
      sensors: "usb_pwr_therm"
      sensors: "usb_pwr_therm2"
      sensors: "maxfg"
      sensors: "disp_therm"
      sensors: "therm_6"
      sensors: "therm_7"
      sensors: "battery"
      sensors: "battery_cycle"
      sensors: "soc"
      sensors: "smpl_gm"
      sensors: "LITTLE"
      sensors: "vdroop1"
      sensors: "batoilo"
      sensors: "vdroop2"
      sensors: "batt_vs"
      sensors: "mdis_morepower"
      sensors: "thb_hda"
      sensors: "G3D"
      sensors: "ISP"
      sensors: "TPU"
      sensors: "AUR"
      sensors: "neutral_therm"
      sensors: "quiet_therm"
      sensors: "charger_skin_therm"
    }
  }
}

Test: tested on tangorpro device. Also has been used extensively in Android XR project.
Bug: 423091981
Change-Id: I4a7302a60e79a54d98df8122f6a60aab18555728