Update to latest CameraX library.

Signed-off-by: Keith Conger <keith.conger@blackboxembedded.com>

Author: blackboxembedded

app/build.gradle

@@ -46,7 +46,7 @@ dependencies {
     androidTestImplementation('androidx.test.espresso:espresso-core:3.1.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
-    def camerax_version = "1.2.3"
+    def camerax_version = "1.4.2"
     implementation "androidx.camera:camera-core:$camerax_version"
     implementation "androidx.camera:camera-camera2:$camerax_version"
     implementation "androidx.camera:camera-lifecycle:$camerax_version"