sync: include TARGET_RELEASE when constructing smart sync target.

When using the smart sync option, we try to construct the target that
was "lunched" from the TARGET_PRODUCT and TARGET_BUILD_VARIANT envvars.

However, an android target is now made of three parts,
{TARGET_PRODUCT}-{TARGET_RELEASE}-{TARGET_BUILD_VARIANT}.

I am leaving the option of creating a target if a TARGET_RELEASE is not
specified in case there are other consumers who depend on that option.

BUG=b:358101714
TEST=./run_tests
TEST=smart sync on android repo and manually inspecting
smart_sync_override.xml

Change-Id: I556137e33558783a86a0631f29756910b4a93d92
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/436977
Tested-by: Yiwei Zhang <[email protected]>
Reviewed-by: Yiwei Zhang <[email protected]>
Commit-Queue: Yiwei Zhang <[email protected]>

Author: navilperez

subcmds/sync.py

@@ -1496,6 +1496,19 @@ def _SmartSyncSetup(self, opt, smart_sync_manifest_path, manifest):
                     [success, manifest_str] = server.GetApprovedManifest(
                         branch, target
                     )
+                elif (
+                    "TARGET_PRODUCT" in os.environ
+                    and "TARGET_BUILD_VARIANT" in os.environ
+                    and "TARGET_RELEASE" in os.environ
+                ):
+                    target = "%s-%s-%s" % (
+                        os.environ["TARGET_PRODUCT"],
+                        os.environ["TARGET_RELEASE"],
+                        os.environ["TARGET_BUILD_VARIANT"],
+                    )
+                    [success, manifest_str] = server.GetApprovedManifest(
+                        branch, target
+                    )
                 elif (
                     "TARGET_PRODUCT" in os.environ
                     and "TARGET_BUILD_VARIANT" in os.environ