Shrink / minify the app

[ghusta]

Use build option isMinifyEnabled = true to minify the final APK.

Also add isShrinkResources = true to enable resource shrinking.

AGP will do :

• Code shrinking (or tree-shaking)
• Resource shrinking
• Optimization
• Obfuscation (or identifier minification)

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See: https://developer.android.com/build/shrink-code