Add WebView-based user agent string to debug info

Could probably use this when choosing a user agent later on.

app/src/main/java/eu/kanade/tachiyomi/util/CrashLogUtil.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.os.Build
 import eu.kanade.tachiyomi.BuildConfig
 import eu.kanade.tachiyomi.util.storage.getUriCompat
+import eu.kanade.tachiyomi.util.system.WebViewUtil
 import eu.kanade.tachiyomi.util.system.createFileInCacheDir
 import eu.kanade.tachiyomi.util.system.toShareIntent
 import eu.kanade.tachiyomi.util.system.toast
@@ -35,6 +36,7 @@ class CrashLogUtil(private val context: Context) {
             Device name: ${Build.DEVICE}
             Device model: ${Build.MODEL}
             Device product name: ${Build.PRODUCT}
+            WebView user agent: ${WebViewUtil.getInferredUserAgent(context)}
         """.trimIndent()
     }
 }

core/src/main/java/eu/kanade/tachiyomi/util/system/WebViewUtil.kt

@@ -14,7 +14,24 @@ import kotlin.coroutines.resume
 object WebViewUtil {
     const val SPOOF_PACKAGE_NAME = "org.chromium.chrome"
 
-    const val MINIMUM_WEBVIEW_VERSION = 111
+    const val MINIMUM_WEBVIEW_VERSION = 114
+
+    /**
+     * Uses the WebView's user agent string to create something similar to what Chrome on Android
+     * would return.
+     *
+     * Example of WebView user agent string:
+     *   Mozilla/5.0 (Linux; Android 13; Pixel 7 Build/TQ3A.230901.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/116.0.0.0 Mobile Safari/537.36
+     *
+     * Example of Chrome on Android:
+     *   Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Mobile Safari/537.3
+     */
+    fun getInferredUserAgent(context: Context): String {
+        return WebView(context)
+            .getDefaultUserAgentString()
+            .replace("; Android .*?\\)".toRegex(), "; Android 10; K)")
+            .replace("Version/.* Chrome/".toRegex(), "Chrome/")
+    }
 
     fun supportsWebView(context: Context): Boolean {
         try {