Added the debug.keystore to the repo so that I can move between devices and build the app without getting installation errors on the phone.

Also updated the testModelActivity to a more robust USB connection permissions testing and connection testing....

app/build.gradle.kts

@@ -7,12 +7,22 @@ android {
     namespace = "net.mmanningau.speechtokeyboard"
     compileSdk = 36
 
+    signingConfigs {
+        getByName("debug") {
+            // This tells Gradle to look for the key in the same folder as this build file
+            storeFile = file("debug.keystore")
+            storePassword = "android"
+            keyAlias = "androiddebugkey"
+            keyPassword = "android"
+        }
+    }
+
     defaultConfig {
         applicationId = "net.mmanningau.speechtokeyboard"
         minSdk = 28
         targetSdk = 36
-        versionCode = 12
-        versionName = "1.1"
+        versionCode = 13
+        versionName = "1.1.1"
 
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
@@ -29,6 +39,8 @@ android {
             applicationIdSuffix = ".streaming"
             // This changes the app name on your homescreen to "MyApp (Dev)"
             resValue("string", "app_name", "Speech To Keyboard (Streaming)")
+            // Explicitly tell the debug build to use the config we defined above
+            signingConfig = signingConfigs["debug"]
         }
     }
     compileOptions {