Move dead submodules in-tree

Signed-off-by: swurl <swurl@swurl.xyz>

externals/oboe/tests/UnitTestRunner/build.gradle

@@ -0,0 +1,29 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    repositories {
+        mavenCentral()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
+    }
+
+    dependencies {
+        classpath 'com.android.tools.build:gradle:8.5.1'
+    }
+}
+
+allprojects {
+    repositories {
+        mavenCentral()
+        maven {
+            url 'https://maven.google.com/'
+            name 'Google'
+        }
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}