Use ApiLevel on min, target and compile Sdk version

This change is a partial revert of aosp/2143082. The reason is
that unreleased apis should be referenced by name instead of a
number.

link to xml reports before/after this cl:
https://drive.google.com/drive/folders/1woIgVlHF6qude5RpW-0mEQLzcXo4isX4?usp=sharing

Test: m lint-check
Change-Id: I6d801f95a24400c9c5c23546e19d6440bd357873
diff --git a/java/base.go b/java/base.go
index 3d7d3de..566d570 100644
--- a/java/base.go
+++ b/java/base.go
@@ -1678,30 +1678,11 @@
 	}
 
 	if ctx.Device() {
-		lintSDKVersion := func(apiLevel android.ApiLevel) int {
+		lintSDKVersion := func(apiLevel android.ApiLevel) android.ApiLevel {
 			if !apiLevel.IsPreview() {
-				return apiLevel.FinalInt()
+				return apiLevel
 			} else {
-				// When running metalava, we pass --version-codename. When that value
-				// is not REL, metalava will add 1 to the --current-version argument.
-				// On old branches, PLATFORM_SDK_VERSION is the latest version (for that
-				// branch) and the codename is REL, except potentially on the most
-				// recent non-master branch. On that branch, it goes through two other
-				// phases before it gets to the phase previously described:
-				//  - PLATFORM_SDK_VERSION has not been updated yet, and the codename
-				//    is not rel. This happens for most of the internal branch's life
-				//    while the branch has been cut but is still under active development.
-				//  - PLATFORM_SDK_VERSION has been set, but the codename is still not
-				//    REL. This happens briefly during the release process. During this
-				//    state the code to add --current-version is commented out, and then
-				//    that commenting out is reverted after the codename is set to REL.
-				// On the master branch, the PLATFORM_SDK_VERSION always represents a
-				// prior version and the codename is always non-REL.
-				//
-				// We need to add one here to match metalava adding 1. Technically
-				// this means that in the state described in the second bullet point
-				// above, this number is 1 higher than it should be.
-				return ctx.Config().PlatformSdkVersion().FinalInt() + 1
+				return ctx.Config().DefaultAppTargetSdk(ctx)
 			}
 		}