DO NOT MERGE: WIP: apksig: Import required subset of apksig

Useful for extracting the signature scheme block for frosting verification.

Source: https://android.googlesource.com/platform/tools/apksig/

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

apksig/.gitignore

@@ -0,0 +1 @@
+/build

apksig/build.gradle.kts

@@ -0,0 +1,26 @@
+plugins {
+    alias(libs.plugins.android.library)
+}
+
+android {
+    namespace = "com.android.apksig"
+    compileSdk = 34
+
+    defaultConfig {
+        minSdk = 21
+        aarMetadata {
+            minCompileSdk = 21
+        }
+        consumerProguardFiles("consumer-rules.pro")
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+}

apksig/src/main/AndroidManifest.xml

@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+</manifest>

build.gradle.kts

@@ -21,6 +21,7 @@
 
 plugins {
     alias(libs.plugins.android.application) apply false
+    alias(libs.plugins.android.library) apply false
     alias(libs.plugins.jetbrains.kotlin.android) apply false
     alias(libs.plugins.jetbrains.kotlin.compose) apply false
     alias(libs.plugins.jetbrains.kotlin.parcelize) apply false

gradle/libs.versions.toml

@@ -90,6 +90,7 @@ squareup-okhttp = { module = "com.squareup.okhttp3:okhttp", version.ref = "okhtt
 
 [plugins]
 android-application = { id = "com.android.application", version.ref = "androidGradlePlugin" }
+android-library = { id = "com.android.library", version.ref = "androidGradlePlugin" }
 androidx-navigation = { id = "androidx.navigation.safeargs.kotlin", version.ref = "navVersion" }
 google-ksp = { id = "com.google.devtools.ksp", version.ref = "kspVersion" }
 hilt-android-plugin = { id = "com.google.dagger.hilt.android", version.ref = "hiltVersion" }

settings.gradle.kts

@@ -39,4 +39,5 @@ dependencyResolutionManagement {
     }
 }
 include(":app")
+include(":apksig")
 rootProject.name = "AuroraStore4"