feat: Add support for instrumentation version annotations (#1179)

* feat: Add support for instrumentation version annotations

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

* fix test

* Update version

* Change versioning tags

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: losalex

.github/release-please.yml

@@ -10,3 +10,5 @@ branches:
     handleGHRelease: true
     releaseType: java-backport
     branch: 3.7.x
+extraFiles:
+  - src/main/java/com/google/cloud/logging/Instrumentation.java

google-cloud-logging/src/main/java/com/google/cloud/logging/Instrumentation.java

@@ -37,7 +37,9 @@ public final class Instrumentation {
   public static final String INSTRUMENTATION_NAME_KEY = "name";
   public static final String INSTRUMENTATION_VERSION_KEY = "version";
   public static final String JAVA_LIBRARY_NAME_PREFIX = "java";
-  public static final String DEFAULT_INSTRUMENTATION_VERSION = "UNKNOWN";
+  // {x-version-update-start:google-cloud-logging:current}
+  public static final String DEFAULT_INSTRUMENTATION_VERSION = "1.0.0";
+  // {x-version-update-end}
   public static final String INSTRUMENTATION_LOG_NAME = "diagnostic-log";
   public static final int MAX_DIAGNOSTIC_VALUE_LENGTH = 14;
   public static final int MAX_DIAGNOSTIC_ENTIES = 3;
@@ -220,8 +222,8 @@ static boolean setInstrumentationStatus(boolean value) {
    * Returns a library version associated with given class
    *
    * @param libraryClass {Class<?>} The class to be used to determine a library version
-   * @return The version number string for given class or "UNKNOWN" if class library version cannot
-   *     be detected
+   * @return The version number string for given class or DEFAULT_INSTRUMENTATION_VERSION if class
+   *     library version cannot be detected
    */
   public static String getLibraryVersion(Class<?> libraryClass) {
     String libraryVersion = GaxProperties.getLibraryVersion(libraryClass);

google-cloud-logging/src/test/java/com/google/cloud/logging/InstrumentationTest.java

@@ -41,7 +41,7 @@ public class InstrumentationTest {
   private static final LogEntry STRING_ENTRY = LogEntry.newBuilder(STRING_PAYLOAD).build();
   private static final String JAVA_OTHER_NAME = "java-other";
   private static final String JAVA_INVALID_NAME = "no-java-name";
-  private static final String JAVA_OTHER_VERSION = "1.0.0";
+  private static final String JAVA_OTHER_VERSION = "0.0.0";
 
   @Test
   public void testInstrumentationGenerated() {