framework源码编译出来的jar路径如下：
out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes.jar
droidlogic源码编译(vendor/amlogic/frameworks/core/java)出来的jar路径：
out/target/common/obj/JAVA_LIBRARIES/droidlogic_intermediates/classes.jar
Android studio 的app\libs下面存放jar包
app\build.gradle文件中如下：
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
系统权限签名：
签名工具存放在系统源码的目录 out/host/linux-x86/framework/signapk.jar
签名文件存放在系统源码的目录 build/target/product/security/
签名方法：java -jar signapk.jar platform.x509.pem platform.pk8 old.apk new.apk