alexa: provide hint that medium resolution is always used.

plugins/alexa/package-lock.json

@@ -1,12 +1,12 @@
 {
    "name": "@scrypted/alexa",
-   "version": "0.0.19",
+   "version": "0.0.20",
    "lockfileVersion": 2,
    "requires": true,
    "packages": {
       "": {
          "name": "@scrypted/alexa",
-         "version": "0.0.19",
+         "version": "0.0.20",
          "dependencies": {
             "@types/node": "^16.6.1",
             "alexa-smarthome-ts": "^0.0.1",

plugins/alexa/package.json

@@ -1,6 +1,6 @@
 {
    "name": "@scrypted/alexa",
-   "version": "0.0.19",
+   "version": "0.0.20",
    "scripts": {
       "scrypted-setup-project": "scrypted-setup-project",
       "prescrypted-setup-project": "scrypted-package-json",

plugins/alexa/src/types/camera.ts

@@ -50,7 +50,7 @@ addSupportedType(ScryptedDeviceType.Camera, {
             capabilities
         }
     },
-    async reportState(device: ScryptedDevice & MotionSensor): Promise<StateReport>{
+    async reportState(device: ScryptedDevice & MotionSensor): Promise<StateReport> {
         return {
             type: 'state',
             namespace: 'Alexa',
@@ -110,6 +110,12 @@ export class AlexaSignalingSession implements RTCSignalingSession {
                 sdp: this.directive.payload.offer.value,
             },
             disableTrickle: true,
+            // this could be a low resolution screen, no way of knowing, so never send a
+            // 1080p+ stream.
+            screen: {
+                width: 1280,
+                height: 720,
+            }
         }
     }