Add missing newlines to the ends of files.

Author: kinyoklion

lib/shared/internal/src/main/java/com/launchdarkly/sdk/internal/collections/package-info.java

@@ -4,4 +4,4 @@
  * This package contains collection utilities used internally by the SDK. Classes in this package
  * are not part of the public API and may change without notice.
  */
-package com.launchdarkly.sdk.internal.collections;
+package com.launchdarkly.sdk.internal.collections;

lib/shared/internal/src/test/java/com/launchdarkly/sdk/internal/collections/package-info.java

@@ -1,4 +1,4 @@
 /**
  * Tests for internal collection utilities.
  */
-package com.launchdarkly.sdk.internal.collections;
+package com.launchdarkly.sdk.internal.collections;