chore(gradle): add root settings for uatu multi-project build

Links :sidecar and :sdk-android under one wrapper. Root build.gradle
provides a clean task that wipes the root build dir.

build.gradle.kts

@@ -0,0 +1,3 @@
+tasks.register("clean", Delete::class) {
+    delete(rootProject.layout.buildDirectory)
+}

gradle.properties

@@ -0,0 +1,5 @@
+org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
+org.gradle.parallel=true
+org.gradle.caching=true
+kotlin.code.style=official
+android.useAndroidX=true

settings.gradle.kts

@@ -0,0 +1,21 @@
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+        google()
+        mavenCentral()
+    }
+}
+
+dependencyResolutionManagement {
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+rootProject.name = "uatu"
+
+include(":sidecar")
+include(":sdk-android")
+project(":sdk-android").projectDir = file("sdk/android")