chore: re-generated to pick up changes from googleapis (#364)

* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* fix(spanner): update UpdateBackup to be retryable

PiperOrigin-RevId: 322293383

Source-Author: Google APIs <noreply@google.com>
Source-Date: Mon Jul 20 22:14:54 2020 -0700
Source-Repo: googleapis/googleapis
Source-Sha: 8f2eda119e11c8bd0c189b545da18bba9019c83e
Source-Link: googleapis/googleapis@8f2eda1

README.md

@@ -38,7 +38,7 @@ If you are using Maven without BOM, add this to your dependencies:
 <dependency>
   <groupId>com.google.cloud</groupId>
   <artifactId>google-cloud-spanner</artifactId>
-  <version>1.58.0</version>
+  <version>1.59.0</version>
 </dependency>
 
 ```

google-cloud-spanner/src/main/java/com/google/cloud/spanner/admin/database/v1/stub/DatabaseAdminStubSettings.java

@@ -888,8 +888,8 @@ private static Builder initDefaults(Builder builder) {
 
       builder
           .updateBackupSettings()
-          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("no_retry_1_codes"))
-          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("no_retry_1_params"));
+          .setRetryableCodes(RETRYABLE_CODE_DEFINITIONS.get("retry_policy_1_codes"))
+          .setRetrySettings(RETRY_PARAM_DEFINITIONS.get("retry_policy_1_params"));
 
       builder
           .deleteBackupSettings()

synth.metadata

@@ -4,15 +4,15 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-spanner.git",
-        "sha": "6ee83b5ce2e1c2a26ca83450f3a6b77f7c327b52"
+        "sha": "e89c601493c527ca9b9dcdac7ae5e26440f3a4fb"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "59f97e6044a1275f83427ab7962a154c00d915b5",
-        "internalRef": "321058159"
+        "sha": "8f2eda119e11c8bd0c189b545da18bba9019c83e",
+        "internalRef": "322293383"
       }
     },
     {