[view_compiler] Add end-to-end DexBuilder tests

These tests verify that code produced by DexBuilder can be loaded and run on
device. It works by introducing a new tool, dex_testcase_generator, which writes
out a couple of DEX files with test cases. This tool runs as a build step. The
generated DEX are then copied over to the device where they are loaded and run
the on-device DexBuilderTest.

Bug: 111895153

Change-Id: I06f5edd0e3e2f4e9ec2d14a0db7d22b75b424119
diff --git a/startop/view_compiler/Android.bp b/startop/view_compiler/Android.bp
index c39688c..0c40a6b 100644
--- a/startop/view_compiler/Android.bp
+++ b/startop/view_compiler/Android.bp
@@ -62,3 +62,22 @@
     ],
     test_suites: ["general-tests"],
 }
+
+cc_binary_host {
+    name: "dex_testcase_generator",
+    defaults: ["viewcompiler_defaults"],
+    srcs: ["dex_testcase_generator.cc"],
+    static_libs: [
+        "libviewcompiler",
+    ],
+}
+
+genrule {
+    name: "generate_dex_testcases",
+    tools: [":dex_testcase_generator"],
+    cmd: "$(location :dex_testcase_generator) $(genDir)",
+    out: [
+        "simple.dex",
+        "trivial.dex",
+    ],
+}