Moved crash.log file

app/src/main/java/eu/faircode/email/ActivityView.java

@@ -1420,7 +1420,7 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
         new SimpleTask<Long>() {
             @Override
             protected Long onExecute(Context context, Bundle args) throws Throwable {
-                File file = new File(context.getCacheDir(), "crash.log");
+                File file = new File(context.getFilesDir(), "crash.log");
                 if (file.exists()) {
                     StringBuilder sb = new StringBuilder();
                     try {

app/src/main/java/eu/faircode/email/Log.java

@@ -1628,7 +1628,7 @@ public class Log {
     }
 
     static void writeCrashLog(Context context, Throwable ex) {
-        File file = new File(context.getCacheDir(), "crash.log");
+        File file = new File(context.getFilesDir(), "crash.log");
         Log.w("Writing exception to " + file);
 
         try (FileWriter out = new FileWriter(file, true)) {