Allow codename.fingerprint format for targetSdkVersion

Use codename.fingerprint format for targetSdkVersion if it is unset
in the manifest and UNBUNDLED_BUILD_TARGET_SDK_WITH_API_FINGERPRINT=true.

Test: manual
Bug: 130541924
Change-Id: I4e3b1274cc32038b00b292dc6d67559eb320e9e4
diff --git a/android/config.go b/android/config.go
index 0191e38..4c7356a 100644
--- a/android/config.go
+++ b/android/config.go
@@ -622,7 +622,7 @@
 	return Bool(c.productVariables.Unbundled_build)
 }
 
-func (c *config) UnbundledBuildPrebuiltSdks() bool {
+func (c *config) UnbundledBuildUsePrebuiltSdks() bool {
 	return Bool(c.productVariables.Unbundled_build) && !Bool(c.productVariables.Unbundled_build_sdks_from_source)
 }