Fix button widget authentication dismissed due to non-foreground wind…

…ow (#4066)

- Fixes the button widget authentication dialog automatically being dismissed when triggered on Android 14 QPR1+, because the window was not in the foreground. It looks like the framework check for this was bugged before QPR1, and the Home Assistant app was showing the authentication dialog before the window (which is transparent) was in the foreground.

app/src/main/java/io/homeassistant/companion/android/widgets/common/WidgetAuthenticationActivity.kt

@@ -15,12 +15,20 @@ class WidgetAuthenticationActivity : AppCompatActivity() {
         private const val TAG = "WidgetAuthenticationA"
     }
 
+    private var authenticating = false
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         Log.d(TAG, "onCreate in WidgetAuthenticationActivity called")
+    }
 
-        val authenticator = Authenticator(this, this, ::authenticationResult)
-        authenticator.authenticate(getString(R.string.biometric_set_title))
+    override fun onWindowFocusChanged(hasFocus: Boolean) {
+        super.onWindowFocusChanged(hasFocus)
+        if (hasFocus && !isFinishing && !authenticating) {
+            val authenticator = Authenticator(this, this, ::authenticationResult)
+            authenticator.authenticate(getString(R.string.biometric_set_title))
+            authenticating = true
+        }
     }
 
     private fun authenticationResult(result: Int) {