ask location permission (fixes #43, #45, #48, #51)

[ComputerOnFire]

Asks the user for permission to use location and bluetooth on app start. Uses the permission_handler flutter pub.

• fixes Ask location permission #43
• fixes Stabilize bluetooth connection #45
• fixes Targeting S+ (version 31 and above) requires that an explicit value for android:exported be defined when intent filters are present #48
• fixes CoreBluetooth requires iOS minimum version of 10.0 #51

[ComputerOnFire]

permission_handler can be upgraded back to 8.2.5 again once we fix #47

[ComputerOnFire]

new permissions called BLUETOOTH_SCAN and BLUETOOTH_CONNECT is needed for Android 12 https://developer.android.com/guide/topics/connectivity/bluetooth/permissions?hl=sl&skip_cache=true

[rrijal53]

@ComputerOnFire we need to add permission here as well , other wise it will not work in IOS
eg:

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      ... # Here are some configurations automatically generated by flutter

      # You can enable the permissions needed here. For example to enable camera
      # permission, just remove the `#` character in front so it looks like this:
      #
      # ## dart: PermissionGroup.camera
      # 'PERMISSION_CAMERA=1'
      #
      #  Preprocessor definitions can be found in: https://github.com/Baseflow/flutter-permission-handler/blob/master/permission_handler/ios/Classes/PermissionHandlerEnums.h
      config.build_settings['GCC_PREPROCESSOR_DEFINITIONS'] ||= [
        '$(inherited)',

        ## dart: [PermissionGroup.location, PermissionGroup.locationAlways, PermissionGroup.locationWhenInUse]
        'PERMISSION_LOCATION=1',

      ]

    end
  end
end