Remove SnakeYAML for manual YAML Parser (#3191)

* Simple straitforward yaml serialization with minimal needed functionality

* Consolidate ApkInfo tests in the package brut.androlib.apk, unify interface YamlReader and add ApkInfoSerializationTest read -> write -> read test

* remove dependencies from snakeyaml

* remove unused methods

* correct indent test value

* correct style with curly braces

* add test item with hieroglyph

brut.apktool/apktool-cli/build.gradle

@@ -89,7 +89,6 @@ tasks.register('proguard', ProGuardTask) {
     dontwarn 'javax.xml.xpath.**'
     dontnote '**'
     // between Java 1.8 and 1.9, the signature of `flip()` changed, which trips up proguard.
-    dontwarn 'org.yaml.snakeyaml.scanner.ScannerImpl'
 
     def outPath = jar.getDestinationDirectory().getAsFile().get().toString()
     def extension = jar.archiveExtension.get().toString()