Update gradle configs to use correct terms and latest library versions
diff --git a/samples/RhythmGame/build.gradle b/samples/RhythmGame/build.gradle
index 4c98f3d..45022e1 100644
--- a/samples/RhythmGame/build.gradle
+++ b/samples/RhythmGame/build.gradle
@@ -31,9 +31,6 @@
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.android.support:appcompat-v7:27.1.0'
-    implementation 'com.android.support.constraint:constraint-layout:1.0.2'
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'com.android.support.test:runner:1.0.1'
-    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
 }
diff --git a/samples/audio-device/build.gradle b/samples/audio-device/build.gradle
index 763cb09..dc9dbbb 100644
--- a/samples/audio-device/build.gradle
+++ b/samples/audio-device/build.gradle
@@ -1,10 +1,10 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
     defaultConfig {
         minSdkVersion 16
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 1
         versionName "1.0"
     }
@@ -17,5 +17,5 @@
 }
 
 dependencies {
-    compile 'com.android.support:appcompat-v7:26.+'
+    implementation 'com.android.support:appcompat-v7:27.1.1'
 }
diff --git a/samples/hello-oboe/build.gradle b/samples/hello-oboe/build.gradle
index 13840d5..a7ad8c1 100644
--- a/samples/hello-oboe/build.gradle
+++ b/samples/hello-oboe/build.gradle
@@ -1,12 +1,12 @@
 apply plugin: 'com.android.application'
 
 android {
-    compileSdkVersion 26
+    compileSdkVersion 27
 
     defaultConfig {
         applicationId 'com.google.sample.oboe.hellooboe'
         minSdkVersion 16
-        targetSdkVersion 26
+        targetSdkVersion 27
         versionCode 1
         versionName '1.0'
         externalNativeBuild {
@@ -33,8 +33,8 @@
 }
 
 dependencies {
-    compile fileTree(include: ['*.jar'], dir: 'libs')
-    compile project(':audio-device')
-    compile 'com.android.support:appcompat-v7:26.+'
-    compile 'com.android.support.constraint:constraint-layout:1.0.2'
+    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    implementation project(':audio-device')
+    implementation 'com.android.support:appcompat-v7:27.1.1'
+    implementation 'com.android.support.constraint:constraint-layout:1.1.2'
 }