[docs] Updating Android Studio instructions in "Configuration"

Summary:
This diff addresses only the Configuration of Android Studio, which differs slightly between Apple silicon and Intel Macs.

• Included instructions to set path to JDK, which is part of the steps of Custom Installation of Android Studio
• Different checkboxes to check between Apple silicon and Intel
• [Android SDK] Bump instructions for Android SDK Platform from "29" to "30"
• [Android SDK] Different choices between Apple silicon and Intel for System Image (Apple silicon uses this Google Play ARM 64 v8a System Image)
• Include instructions to download specific "SDK Tools" to match what's in build.gradle. ndk and CMake did not automatically install on Apple silicon. I think it's okay if devs on Intel Macs double check that these SDK Tools are being used.

Test Plan:
Completely uninstalled Android Studio (on Apple silicon), ran through the installation from scratch and made sure everything was reflected in the updated instructions.
Ran through another fresh Android Studio installation to validate that my changes worked to install and build the app on Android.

Haven't had chance to change Intel Mac instructions much, but I updated the Android SDK Platform to reflect 30 instead of 29.

Reviewers: atul, ashoat

Reviewed By: atul, ashoat

Subscribers: ashoat, geekbrother, palys-swm, Adrian, karol-bisztyga, benschac, boristopalov

Differential Revision: https://phabricator.ashoat.com/D2559