Add volume control to bottom panel

Changes:
- Import a reworked version of the KUKSA.val client code from the
  Flutter dashboard app, with the aggregated signal Riverpod provider
  replaced with per-signal providers for the signal the homescreen
  needs and a couple of temperature ones it might use.  Using separate
  providers is more in-line with recommended Riverpod best practices.
- Various tweaks to enable using Riverpod.
- Split the bottom panel out into its own widget, and add a stack in
  it to layer the default logo panel with the volume control slider,
  which has been added as a new widget definition to provide the hook
  to drive timer based lowering behavior like the Qt homescreen does.
- The KUKSA.val connection widget has been added to the bottom panel
  rather than overriding the top-level widget as in the dashboard and
  HVAC apps.  This seems preferable with respect to still providing
  some functionality in the event KUKSA.val is unavailable.
- Remove the old demo dashboard and HVAC pages that are now unused,
  along with the image assets they needed, to allow cleaning up
  pubspec.yaml and ease maintenance.

Bug-AGL: SPEC-4659

Signed-off-by: Scott Murray <scott.murray@konsulko.com>
Change-Id: I5d9180a3461948a58321564e71134c4961ce0ef7

1 files changed, 4 insertions, 15 deletions

diff --git a/pubspec.yaml b/pubspec.yaml
index dfc2877..115dde6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -32,13 +32,11 @@ dependencies:
   flutter:
     sdk: flutter
 
-  # The following adds the Cupertino Icons font to your application.
-  # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^1.0.2
-
+  meta: ^1.8.0
+  flutter_riverpod: ^2.1.1
   intl: ^0.17.0
-  numberpicker: ^2.1.1
-  provider: ^6.0.1
+  http: ^0.13.5
+  yaml: ^3.1.1
 
   jovial_svg: ^1.1.6
 
@@ -70,15 +68,6 @@ flutter:
   # To add assets to your application, add an assets section, like this:
   assets:
     - images/Utility_Logo_Grey-01.svg
-    - images/HMI_HVAC_Fan_Icon.png
-    - images/HMI_HVAC_Left_Chair_ON.png
-    - images/HMI_HVAC_Right_Chair_ON.png
-    - images/HMI_HVAC_Circulation_Active.png
-    - images/HMI_HVAC_Rear_Active.png
-    - images/HMI_HVAC_Front_Active.png
-    - images/HMI_HVAC_AirDown_Active.png
-    - images/HMI_HVAC_AirUp_Active.png
-    - images/HMI_Dashboard_Car_720.png
 
   # An image asset can refer to one or more resolution-specific "variants", see
   # https://flutter.dev/assets-and-images/#resolution-aware