Build framework.aidl in Soong

Move the rules to build framework.aidl into Soong, and use it
when compiling aidl files with sdk_version: "current".

Also fixes incorrectly using the aidl includes exported by the
"framework" module when the proguardRaiseDep dependency was
added.

Bug: 130798034
Test: sdk_test.go
Change-Id: I126adf1d9e7b6acb528875ff62b974ba7ad9a337

sysprop/sysprop_test.go

@@ -102,6 +102,7 @@ func testContext(config android.Config, bp string,
 		"api/system-removed.txt": nil,
 		"api/test-current.txt":   nil,
 		"api/test-removed.txt":   nil,
+		"framework/aidl/a.aidl":  nil,
 
 		"prebuilts/sdk/current/core/android.jar":                              nil,
 		"prebuilts/sdk/current/public/android.jar":                            nil,