The latest version of cmdline tools (7302050_latest) seems to have a different directory structure. The folder is now called cmdline-tools instead of tools so when you extract the folder it won't work as expected. sdkmanager also seems to expect to want to be in ${ANDROID_HOME}/cmdline-tools/latest/bin but extracting it in ANDROID_HOME will just give you ${ANDROID_HOME}/cmdline-tools/bin...

So it looks like unzipping the newest version to ${ANDROID_HOME}/cmdline-tools/cmdline-tools will fix this, and remove the need to run sdkmanager --sdk_root.... Easiest way might just be to mkdir -p Android/cmdline-tools and unzip to there & rename the second cmdline-tools to latest

Not sure how this whole forking gists thing is supposed to work but here are the changes I used: https://gist.github.com/jason-s-yu/30375db45c1f71c1259e042d216e4bd3

Go to https://developer.android.com/studio?hl=PL 
```bash
wget https://dl.google.com/android/repository/commandlinetools-linux-7302050_latest.zip
mkdir -p Android/cmdline-tools
unzip commandlinetools-linux-6200805_latest.zip -d Android/cmdline-tools
mv Android/cmdline-tools/cmdline-tools Android/cmdline-tools/latest
export ANDROID_HOME=$HOME/Android
```

#### Make sure emulator path comes before tools. Had trouble on Ubuntu with emulator from /tools being loaded
#### instead of the one from /emulator
```bash
export PATH="$ANDROID_HOME/emulator:$ANDROID_HOME/tools:$ANDROID_HOME/tools/bin:$ANDROID_HOME/cmdline-tools/latest:$ANDROID_HOME/cmdline-tools/latest/bin:$ANDROID_HOME/platform-tools:$PATH"
```

#### don't need this anymore
```bash
 sdkmanager --sdk_root=${ANDROID_HOME} "tools"
```
```bash
sdkmanager --update
sdkmanager --list
```
#### find current version
```bash
sdkmanager --list | grep build-tools
sdkmanager "build-tools;30.0.3" "platform-tools" "platforms;android-30" "tools"
sdkmanager --licenses
```