Size apk is too big

[enzzoperez]

🐛 Bug Report

Hello, I'm getting troubles to build an Android APK, I had an project with RN 0.59.4 and thought that I'm was doing sometingh wrong because the APK size is 32mb (in debug) and 29mb (in release), but when I attemp to build a new project from cero appear the same issue. Did I do something wrong?

To Reproduce

react-native init testSize
cd testSize && react-native run-android
cd android/
./gradlew assembleRelease

Expected Behavior

An APK a few smaller

Environment

SO: linux 18.04
package.json

{
  "name": "testsize",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "start": "node node_modules/react-native/local-cli/cli.js start",
    "test": "jest"
  },
  "dependencies": {
    "react": "16.8.6",
    "react-native": "0.59.7"
  },
  "devDependencies": {
    "@babel/core": "^7.4.4",
    "@babel/runtime": "^7.4.4",
    "babel-jest": "^24.8.0",
    "jest": "^24.8.0",
    "metro-react-native-babel-preset": "^0.54.0",
    "react-test-renderer": "16.8.6"
  },
  "jest": {
    "preset": "react-native"
  }
}

react-native info

React Native Environment Info:
    System:
      OS: Linux 4.15 Ubuntu 18.04.2 LTS (Bionic Beaver)
      CPU: (4) x64 Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
      Memory: 367.69 MB / 7.68 GB
      Shell: 4.4.19 - /bin/bash
    Binaries:
      Node: 10.3.0 - ~/.nvm/versions/node/v10.3.0/bin/node
      Yarn: 1.15.2 - /usr/bin/yarn
      npm: 6.1.0 - ~/.nvm/versions/node/v10.3.0/bin/npm
      Watchman: 4.9.0 - /usr/local/bin/watchman
    SDKs:
      Android SDK:
        API Levels: 20, 22, 23, 25, 26, 27, 28
        Build Tools: 27.0.0, 27.0.1, 27.0.3, 28.0.3
        System Images: android-27 | Google APIs Intel x86 Atom
    IDEs:
      Android Studio: 3.1 AI-173.4819257
    npmPackages:
      react: 16.8.6 => 16.8.6 
      react-native: 0.59.7 => 0.59.7 
    npmGlobalPackages:
      react-native-cli: 2.0.1

[react-native-bot]

Can you run react-native info and edit your issue to include these results under the Environment section?

If you believe this information is irrelevant to the reported issue, you may write `[skip envinfo]` alongside an explanation in your Environment: section.

[radeno]

#23575