Add explicit dependency on appcompat for demo app

The demo app was using this via its dependency on the material library,
but it's preferable to list dependencies explicitly (otherwise the build
would break if we removed the material dependency).

PiperOrigin-RevId: 277316175

constants.gradle

@@ -27,6 +27,7 @@ project.ext {
     jsr305Version = '3.0.2'
     jsr305Version = '3.0.2'
     kotlinAnnotationsVersion = '1.3.31'
     kotlinAnnotationsVersion = '1.3.31'
     androidxAnnotationVersion = '1.1.0'
     androidxAnnotationVersion = '1.1.0'
+    androidxAppCompatVersion = '1.1.0'
     androidxCollectionVersion = '1.1.0'
     androidxCollectionVersion = '1.1.0'
     androidxMediaVersion = '1.0.1'
     androidxMediaVersion = '1.0.1'
     androidxTestVersion = '1.1.0'
     androidxTestVersion = '1.1.0'

demos/cast/build.gradle

@@ -56,7 +56,7 @@ dependencies {
     implementation project(modulePrefix + 'library-smoothstreaming')
     implementation project(modulePrefix + 'library-smoothstreaming')
     implementation project(modulePrefix + 'library-ui')
     implementation project(modulePrefix + 'library-ui')
     implementation project(modulePrefix + 'extension-cast')
     implementation project(modulePrefix + 'extension-cast')
-    implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation 'androidx.appcompat:appcompat:' + androidxAppCompatVersion
     implementation 'androidx.recyclerview:recyclerview:1.0.0'
     implementation 'androidx.recyclerview:recyclerview:1.0.0'
     implementation 'com.google.android.material:material:1.0.0'
     implementation 'com.google.android.material:material:1.0.0'
 }
 }

demos/main/build.gradle

@@ -63,6 +63,7 @@ android {
 
 
 dependencies {
 dependencies {
     implementation 'androidx.annotation:annotation:' + androidxAnnotationVersion
     implementation 'androidx.annotation:annotation:' + androidxAnnotationVersion
+    implementation 'androidx.appcompat:appcompat:' + androidxAppCompatVersion
     implementation 'com.google.android.material:material:1.0.0'
     implementation 'com.google.android.material:material:1.0.0'
     implementation project(modulePrefix + 'library-core')
     implementation project(modulePrefix + 'library-core')
     implementation project(modulePrefix + 'library-dash')
     implementation project(modulePrefix + 'library-dash')