How to edit hosts file on android emulator API 30 (Android R)

Question

I'm trying to edit the hosts file on an android emulator with API 30 - Android R. I have completed remount successfully but it says

Remount succeeded. Reboot device for changes to be effective

I am stuck on this step because no matter what way I reboot the emulator, it goes to

Device offline

and shows just a black screen. It gets restored only if I do a factory reset, but again the emulator file system becomes read-only and I cannot edit the hosts file.

The solutions I tried are as follows:

First step is common. In adb command prompt:

cd [...\Android\android-sdk\emulator directory]
emulator -avd [EMULATORNAME] -writable-system

Then in system command prompt,

cd [...\Android\android-sdk\platform-tools directory]

Method 1:

adb root
adb remount

Here remount succeeds but I need to reboot the device. All these ways of rebooting result in Device Offline state and black screen:

1. adb reboot
2. Manually restarting emulator by long pressing power button
3. In adb command prompt, pressing Ctrl + C to stop the emulator and starting again with: emulator -avd [EMULATORNAME] -writable-system

If I ignore the reboot and try to edit the hosts file pushing a new like this:

adb push hosts /system/etc

Then I get

Error, cannot write to a read-only file system.

Method 2:

adb shell
su
mount -o remount,rw /sys

This gives no error or success message. Then if I try any write operation such as:

adb push hosts /system/etc

or

cat hosts

10.1.3.5 bla.blabla.com >> hosts

Then it still says

Error, cannot write to a read-only file system.

I have already tried these links and solutions with no success:

How to edit /etc/hosts file in Android Studio emulator running in nougat?

I can't edit android emulator's host file

Android emulator-5554 offline

android emulator sdk 10 api 29 won't start after remount and reboot

Please help. Thanks in advance!