Write VerifierDeps into VDEX.

This patch serializes VerifierDeps data and writes them into VDEX.
It also extends the VDEX header with sizes of the DEX and verifier
dependencies sections.

Bug: 30937355
Change-Id: I5aa5fc5eb8678533117138e445b757fa771973fb
diff --git a/runtime/vdex_file.cc b/runtime/vdex_file.cc
index a71578b..9fbf875 100644
--- a/runtime/vdex_file.cc
+++ b/runtime/vdex_file.cc
@@ -34,7 +34,9 @@
   return (memcmp(version_, kVdexVersion, sizeof(kVdexVersion)) == 0);
 }
 
-VdexFile::Header::Header() {
+VdexFile::Header::Header(uint32_t dex_size, uint32_t verifier_deps_size)
+    : dex_size_(dex_size),
+      verifier_deps_size_(verifier_deps_size) {
   memcpy(magic_, kVdexMagic, sizeof(kVdexMagic));
   memcpy(version_, kVdexVersion, sizeof(kVdexVersion));
   DCHECK(IsMagicValid());
diff --git a/runtime/vdex_file.h b/runtime/vdex_file.h
index 9215e52..6bea153 100644
--- a/runtime/vdex_file.h
+++ b/runtime/vdex_file.h
@@ -42,17 +42,22 @@
  public:
   struct Header {
    public:
-    Header();
+    Header(uint32_t dex_size, uint32_t verifier_deps_size);
 
     bool IsMagicValid() const;
     bool IsVersionValid() const;
 
+    uint32_t GetDexSize() const { return dex_size_; }
+    uint32_t GetVerifierDepsSize() const { return verifier_deps_size_; }
+
    private:
     static constexpr uint8_t kVdexMagic[] = { 'v', 'd', 'e', 'x' };
     static constexpr uint8_t kVdexVersion[] = { '0', '0', '0', '\0' };
 
     uint8_t magic_[4];
     uint8_t version_[4];
+    uint32_t dex_size_;
+    uint32_t verifier_deps_size_;
   };
 
   static VdexFile* Open(const std::string& vdex_filename,