set nocache option in webview

sometimes there is an error related to cache

Bug: 380536292
Test: turn off screen during installation, and turn on the screen a
minute later

Change-Id: I6626b8e1201e2482f170bf3e75710582740a13ae
diff --git a/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.java b/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.java
index 48d5190..1752828 100644
--- a/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.java
+++ b/android/TerminalApp/java/com/android/virtualization/terminal/MainActivity.java
@@ -15,6 +15,8 @@
  */
 package com.android.virtualization.terminal;
 
+import static android.webkit.WebSettings.LOAD_NO_CACHE;
+
 import android.app.Notification;
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
@@ -129,6 +131,7 @@
         mWebView.getSettings().setDatabaseEnabled(true);
         mWebView.getSettings().setDomStorageEnabled(true);
         mWebView.getSettings().setJavaScriptEnabled(true);
+        mWebView.getSettings().setCacheMode(LOAD_NO_CACHE);
         mWebView.setWebChromeClient(new WebChromeClient());
 
         setupModifierKeys();