Move dead submodules in-tree

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

externals/oboe/samples/audio-device/build.gradle

@@ -0,0 +1,24 @@
+apply plugin: 'com.android.library'
+
+android {
+    defaultConfig {
+        minSdkVersion 21
+        targetSdkVersion 35
+        compileSdkVersion 35
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt')
+        }
+    }
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_18
+        targetCompatibility JavaVersion.VERSION_18
+    }
+    namespace 'com.google.oboe.samples.audio_device'
+}
+
+dependencies {
+    implementation 'androidx.appcompat:appcompat:1.7.0'
+}