Add analyze_bcpf.py script to help manage bootclasspath_fragments

The analyze_bcpf.py script can be used by bootclasspath_fragment owners
to help setup their fragment and also to debug issues that arise during
use.

It is run by specifying the name of the bootclasspath_fragment module
in the --bcpf option. If specified the --apex and --sdk options will
allow the tool to produce more helpful messages.

The script currently:
* Builds out/soong/hiddenapi/hiddenapi-stub-flags.txt and checks any
  inconsistencies between those flags and the flags generated for the
  bootclasspath_fragment.

* Builds out/soong/hiddenapi/hiddenapi-flags.csv and checks any
  inconsistencies between those flags and the flags generated for the
  bootclasspath_fragment. It will describe the changes that need to
  be made in order to fix any inconsistencies in the flags.

Bug: 202154151
Test: m analyze_bcpf && analyze_bcpf --bcpf art-bootclasspath-fragment
      atest --host analyze_bcpf_test
Change-Id: I824fd9d527d246dfe56725c073d89a0b0e72d25a

scripts/hiddenapi/Android.bp

@@ -18,6 +18,48 @@ package {
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
+python_binary_host {
+    name: "analyze_bcpf",
+    main: "analyze_bcpf.py",
+    srcs: ["analyze_bcpf.py"],
+    libs: [
+        "signature_trie",
+    ],
+    version: {
+        py2: {
+            enabled: false,
+        },
+        py3: {
+            enabled: true,
+            embedded_launcher: true,
+        },
+    },
+}
+
+python_test_host {
+    name: "analyze_bcpf_test",
+    main: "analyze_bcpf_test.py",
+    srcs: [
+        "analyze_bcpf.py",
+        "analyze_bcpf_test.py",
+    ],
+    libs: [
+        "signature_trie",
+    ],
+    version: {
+        py2: {
+            enabled: false,
+        },
+        py3: {
+            enabled: true,
+            embedded_launcher: true,
+        },
+    },
+    test_options: {
+        unit_test: true,
+    },
+}
+
 python_binary_host {
     name: "merge_csv",
     main: "merge_csv.py",