chore(java): update release_type choices to stable and preview (#1331)

* chore(java): update release_type choices to stable and preview * chore: update badge names

Author: Neenu1995

synthtool/gcp/templates/java_library/README.md

@@ -13,7 +13,7 @@ Java idiomatic client for [{{metadata['repo']['name_pretty']}}][product-docs].
 - [Client Library Documentation][javadocs]
 {% if 'partials' in metadata and metadata['partials']['deprecation_warning'] -%}
 {{ metadata['partials']['deprecation_warning'] }}
-{% elif metadata['repo']['release_level'] in ['alpha', 'beta'] %}
+{% elif metadata['repo']['release_level'] in ['preview'] %}
 > Note: This client is a work-in-progress, and may occasionally
 > make backwards-incompatible changes.
 {% endif %}
@@ -182,7 +182,7 @@ and on [google-cloud-java][g-c-j].
 {% else %}
 This library follows [Semantic Versioning](http://semver.org/).
 
-{% if metadata['repo']['release_level'] in ['alpha', 'beta'] %}
+{% if metadata['repo']['release_level'] in ['preview'] %}
 It is currently in major version zero (``0.y.z``), which means that anything may change at any time
 and the public API should not be considered stable.
 {% endif %}{% endif %}
@@ -229,7 +229,7 @@ Java is a registered trademark of Oracle and/or its affiliates.
 [kokoro-badge-link-4]: http://storage.googleapis.com/cloud-devrel-public/java/badges/{{ repo_short }}/java8-win.html
 [kokoro-badge-image-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/{{ repo_short }}/java11.svg
 [kokoro-badge-link-5]: http://storage.googleapis.com/cloud-devrel-public/java/badges/{{ repo_short }}/java11.html
-[stability-image]: https://img.shields.io/badge/stability-{% if metadata['repo']['release_level'] == 'ga' %}ga-green{% elif metadata['repo']['release_level'] == 'beta' %}beta-yellow{% elif metadata['repo']['release_level'] == 'alpha' %}alpha-orange{% else %}unknown-red{% endif %}
+[stability-image]: https://img.shields.io/badge/stability-{% if metadata['repo']['release_level'] == 'stable' %}stable-green{% elif metadata['repo']['release_level'] == 'preview' %}preview-yellow{% else %}unknown-red{% endif %}
 [maven-version-image]: https://img.shields.io/maven-central/v/{{ group_id }}/{{ artifact_id }}.svg
 [maven-version-link]: https://search.maven.org/search?q=g:{{ group_id }}%20AND%20a:{{ artifact_id }}&core=gav
 [authentication]: https://github.com/googleapis/google-cloud-java#authentication

tests/fixtures/java_templates/release-please-update/.repo-metadata.json

@@ -6,12 +6,13 @@
  "api_description": "provides inventory services based on a time series database. This database keeps a five week history of Google Cloud asset metadata. The Cloud Asset Inventory export service allows you to export all asset metadata at a certain timestamp or export event change history during a timeframe.",
  "client_documentation": "https://googleapis.dev/java/google-cloud-asset/latest/index.html",
  "issue_tracker": "https://issuetracker.google.com/issues/new?component=187210&template=0",
- "release_level": "ga",
+ "release_level": "stable",
  "transport": "grpc",
  "requires_billing": true,
  "language": "java",
  "repo": "googleapis/java-asset",
  "repo_short": "java-asset",
  "distribution_name": "com.google.cloud:google-cloud-asset",
+ "library_type": "GAPIC_AUTO",
  "api_id": "cloudasset.googleapis.com"
 }

tests/fixtures/java_templates/standard/.repo-metadata.json

@@ -6,12 +6,13 @@
  "api_description": "provides inventory services based on a time series database. This database keeps a five week history of Google Cloud asset metadata. The Cloud Asset Inventory export service allows you to export all asset metadata at a certain timestamp or export event change history during a timeframe.",
  "client_documentation": "https://googleapis.dev/java/google-cloud-asset/latest/index.html",
  "issue_tracker": "https://issuetracker.google.com/issues/new?component=187210&template=0",
- "release_level": "ga",
+ "release_level": "stable",
  "transport": "grpc",
  "requires_billing": true,
  "language": "java",
  "repo": "googleapis/java-asset",
  "repo_short": "java-asset",
  "distribution_name": "com.google.cloud:google-cloud-asset",
+ "library_type": "GAPIC_AUTO",
  "api_id": "cloudasset.googleapis.com"
 }