add jdk install instructions

Expensify · Jun 21, 2021 · 326d443 · 326d443
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commit 326d443
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diff --git a/README.md b/README.md
@@ -46,6 +46,7 @@ You can use any IDE or code editing tool for developing on any platform. Use you
 
 ## Running the Android app 🤖
 * To install the Android dependencies, run: `npm install`, then `gradle` will install all linked dependencies
+* Make sure you have Java installed `java -version`. If not, install it by running `npm install -g openjdk8`.
 * To run a on a **Development Emulator**: `npm run android`
 * Changes applied to Javascript will be applied automatically, any changes to native code will require a recompile