Fix license texts.

Push specific licenses down the tree toward the leaf directories.

Remove extra Apache 2.0 license texts--just use Android-Apache-2.0

Test: m nothing
Change-Id: Ibee25f75f5933699d6f43acdc192b2ada6823757
diff --git a/tools/Android.bp b/tools/Android.bp
index 4e90ee0..842252e 100644
--- a/tools/Android.bp
+++ b/tools/Android.bp
@@ -1,11 +1,17 @@
 package {
     // See: http://go/android-license-faq
-    // A large-scale-change added 'default_applicable_licenses' to import
-    // all of the 'license_kinds' from "development_license"
-    // to get the below license kinds:
-    //   SPDX-license-identifier-Apache-2.0
-    //   legacy_unencumbered
-    default_applicable_licenses: ["development_license"],
+    default_applicable_licenses: [
+        "Android-Apache-2.0",
+        "development_tools_license",
+    ],
+}
+
+license {
+    name: "development_tools_license",
+    visibility: [":__subpackages__"],
+    license_kinds: [
+        "legacy_unencumbered",
+    ],
 }
 
 subdirs = ["*"]