Update APKtool to 2.2.4

[alebcay]

• Android O Final Dev Preview support (Kotlin Sample App - Build not working iBotPeaches/Apktool#1520)
• SnakeYAML 1.1.8 Android Support (Snakeyaml incompatibility with Android iBotPeaches/Apktool#591)
• Fix issue with APKs taking longer than usual to parse resources (Very slow performance of AndroidLib.decodeManifestWithResources iBotPeaches/Apktool#1489)
• Fix issue with internal binaries not accessible in a Spring boot environment. (Prebuilt aapt not found if apktool jar is built into a spring boot app iBotPeaches/Apktool#1543)
• Fix issues with rebuilding applications originally built with aapt2. (Kotlin Sample App - Build not working iBotPeaches/Apktool#1520)
• Patch aapt to support the $ character in resource filenames. (Error when Compiling apk Magisk iBotPeaches/Apktool#1532)
• Fix issue where apktool was holding locks onto files during execution. (Make sure to close the file after reading in. iBotPeaches/Apktool#1561)
• Fix issue with APKs that last resource in pool is INVALID_TYPE_CONFIG. (Error decompiling Hangouts v.20+ iBotPeaches/Apktool#1534)
• Fix issue with APKs that are including malformed characters to break parser. (Could not decode res(arsc) iBotPeaches/Apktool#1564)
• Only exit with 0 error code during version commands.
• Enforce license header on all source files.
• [Security] Prevent malicous directory traversal with unknown files.
• [Security] Prevent XXE vulnerability when given a malicious AndroidManifest.xml
• Upgrade to gradle 4.0.

[mfonville]

Thanks!