Make dagger.internal.Provider extend jakarta.inject.Provider.

Issue #2058.

RELNOTES=Add a jakarta.inject.Provider runtime dependency in preparation for supporting Jakarta Providers
PiperOrigin-RevId: 634896178

Author: Chang-Eric

java/dagger/BUILD

@@ -34,6 +34,7 @@ java_library(
     exports = ["//third_party/java/jsr330_inject"],
     deps = [
         "//third_party/java/jsr330_inject",
+        "@maven//:jakarta_inject_jakarta_inject_api",
     ],
 )
 
@@ -43,6 +44,7 @@ gen_maven_artifact(
     artifact_name = "Dagger",
     artifact_target = ":core",
     artifact_target_maven_deps = [
+        "jakarta.inject:jakarta.inject-api",
         "javax.inject:javax.inject",
     ],
     javadoc_root_packages = ["dagger"],

java/dagger/internal/Provider.java

@@ -20,6 +20,5 @@
  * Internal Provider interface to make support for {@code javax.inject.Provider} and
  * {@code jakarta.inject.Provider} easier. Do not use outside of Dagger implementation code.
  */
-// TODO(erichang): Make this also extend the Jakarta Provider
-public interface Provider<T> extends javax.inject.Provider<T> {
+public interface Provider<T> extends javax.inject.Provider<T>, jakarta.inject.Provider<T> {
 }