[PM-19013] Create core module (#4836)

core/.gitignore

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

core/README.md

@@ -0,0 +1,13 @@
+# Core module
+
+A collection of platform specific objects and extensions used by other Bitwarden applications and
+libraries.
+
+## Contents
+
+- [Compatibility](#compatibility)
+
+## Compatibility
+
+- **Minimum SDK**: 28
+- **Target SDK**: 35

core/build.gradle.kts

@@ -0,0 +1,37 @@
+plugins {
+    alias(libs.plugins.android.library)
+    alias(libs.plugins.kotlin.android)
+}
+
+android {
+    namespace = "com.bitwarden.core"
+    compileSdk = libs.versions.compileSdk.get().toInt()
+
+    defaultConfig {
+        // Set the minimum SDK version to the SDK version used by Authenticator, which is the lowest
+        // universally supported SDK version.
+        minSdk = libs.versions.minSdkBwa.get().toInt()
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        consumerProguardFiles("consumer-rules.pro")
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(
+                getDefaultProguardFile("proguard-android-optimize.txt"),
+                "proguard-rules.pro",
+            )
+        }
+    }
+    compileOptions {
+        sourceCompatibility(libs.versions.jvmTarget.get())
+        targetCompatibility(libs.versions.jvmTarget.get())
+    }
+    kotlinOptions {
+        jvmTarget = libs.versions.jvmTarget.get()
+    }
+}
+
+dependencies { }

core/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

settings.gradle.kts

@@ -48,6 +48,9 @@ buildCache {
 }
 
 rootProject.name = "Bitwarden"
-include(":app")
-include(":authenticatorbridge")
-include(":authenticator")
+include(
+    ":app",
+    ":authenticator",
+    ":authenticatorbridge",
+    ":core",
+)