Wrong (or at least not descriptive) "error Android project not found" msg

[scarlehoff]

Description

A badly formatted AndroidManifest file will make react-native run-android fail with the following message:

error Android project not found. Are you sure this is a React Native project? If your Android files are located in a non-standard lo
cation (e.g. not inside 'android' folder), consider setting `project.android.sourceDir` option to point to a new location

It will be very useful to either point to the actual error or just say that it could not run for some reason without giving a wrong reason.

React Native version:

Binaries:
Node: 14.3.0 - /usr/bin/node
Yarn: 1.22.4 - /usr/bin/yarn
npm: 6.14.5 - /usr/bin/npm
Watchman: 4.9.0 - /usr/bin/watchman
SDKs:
Android SDK:
API Levels: 28, 29
Build Tools: 28.0.3, 29.0.2, 29.0.3
System Images: android-29 | Google APIs Intel x86 Atom
npmPackages:
react: 16.11.0 => 16.11.0
react-native: 0.62.2 => 0.62.2
npmGlobalPackages:
react-native: 0.60.5

Steps To Reproduce

1. Open android/app/src/main/AndroidManifest.xml
2. Add some random mistakes
3. Try to run react-native run-android

Great project and thank you very much for your hard work!

(originally put this issue in this repository: facebook/react-native#29035 but was told to bring it here!)

[thymikee]

Yep, this would definitely use an improvement!