Fix some IO related crashes (#1008)

## Description
- Catch network exceptions when querying to populate the nav drawer
- Perform screensaver work on IO thread
- Fix possible crash if screensaver service runs while regular activity
is destroyed
- Fix genre images & backdrop images not loading

This PR also adds an Jellyfin SDK `ApiClient` wrapper to push all
network calls onto the IO thread. And tries to use a more strict
network-on-main policy for debug builds.

### Related issues
Fixes #994
Fixes #1001
Should fix #1003

### Testing
Emulator with simulated exception throws

## Screenshots
N/A

## AI or LLM usage
None

app/src/main/java/com/github/damontecres/wholphin/util/CoroutineContextApiClient.kt

@@ -0,0 +1,88 @@
+package com.github.damontecres.wholphin.util
+
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import org.jellyfin.sdk.api.client.ApiClient
+import org.jellyfin.sdk.api.client.ApiClientFactory
+import org.jellyfin.sdk.api.client.HttpClientOptions
+import org.jellyfin.sdk.api.client.HttpMethod
+import org.jellyfin.sdk.api.client.RawResponse
+import org.jellyfin.sdk.api.okhttp.OkHttpFactory
+import org.jellyfin.sdk.api.sockets.SocketApi
+import org.jellyfin.sdk.api.sockets.SocketConnection
+import org.jellyfin.sdk.api.sockets.SocketConnectionFactory
+import org.jellyfin.sdk.model.ClientInfo
+import org.jellyfin.sdk.model.DeviceInfo
+import kotlin.coroutines.CoroutineContext
+
+/**
+ * Wraps [ApiClient.request] with the given [CoroutineContext]
+ */
+class CoroutineContextApiClient(
+    private val client: ApiClient,
+    private val coroutineContext: CoroutineContext = Dispatchers.IO,
+) : ApiClient() {
+    override val baseUrl: String?
+        get() = client.baseUrl
+    override val accessToken: String?
+        get() = client.accessToken
+    override val clientInfo: ClientInfo
+        get() = client.clientInfo
+    override val deviceInfo: DeviceInfo
+        get() = client.deviceInfo
+    override val httpClientOptions: HttpClientOptions
+        get() = client.httpClientOptions
+    override val webSocket: SocketApi
+        get() = client.webSocket
+
+    override fun update(
+        baseUrl: String?,
+        accessToken: String?,
+        clientInfo: ClientInfo,
+        deviceInfo: DeviceInfo,
+    ) {
+        client.update(baseUrl, accessToken, clientInfo, deviceInfo)
+    }
+
+    override suspend fun request(
+        method: HttpMethod,
+        pathTemplate: String,
+        pathParameters: Map<String, Any?>,
+        queryParameters: Map<String, Any?>,
+        requestBody: Any?,
+    ): RawResponse =
+        withContext(coroutineContext) {
+            client.request(
+                method,
+                pathTemplate,
+                pathParameters,
+                queryParameters,
+                requestBody,
+            )
+        }
+}
+
+class CoroutineContextApiClientFactory(
+    private val factory: OkHttpFactory,
+    private val coroutineContext: CoroutineContext = Dispatchers.IO,
+) : ApiClientFactory,
+    SocketConnectionFactory {
+    override fun create(
+        baseUrl: String?,
+        accessToken: String?,
+        clientInfo: ClientInfo,
+        deviceInfo: DeviceInfo,
+        httpClientOptions: HttpClientOptions,
+        socketConnectionFactory: SocketConnectionFactory,
+    ): ApiClient =
+        CoroutineContextApiClient(
+            factory.create(baseUrl, accessToken, clientInfo, deviceInfo, httpClientOptions, socketConnectionFactory),
+            coroutineContext,
+        )
+
+    override fun create(
+        clientOptions: HttpClientOptions,
+        scope: CoroutineScope,
+    ): SocketConnection = factory.create(clientOptions, scope)
+}