AAPT: ProGuard config for components in main dex.

Create an analogue of "aapt -G" which outputs a proguard configuration
that keeps only components which need to be in the main dex.

BUG: 27383099

Change-Id: Ic18c8c563794ff27a5598a214111d1b446a005f1
diff --git a/tools/aapt/Bundle.h b/tools/aapt/Bundle.h
index ca06ac4..653c1b4 100644
--- a/tools/aapt/Bundle.h
+++ b/tools/aapt/Bundle.h
@@ -55,7 +55,7 @@
           mCompressionMethod(0), mJunkPath(false), mOutputAPKFile(NULL),
           mManifestPackageNameOverride(NULL), mInstrumentationPackageNameOverride(NULL),
           mAutoAddOverlay(false), mGenDependencies(false), mNoVersionVectors(false),
-          mCrunchedOutputDir(NULL), mProguardFile(NULL),
+          mCrunchedOutputDir(NULL), mProguardFile(NULL), mMainDexProguardFile(NULL),
           mAndroidManifestFile(NULL), mPublicOutputFile(NULL),
           mRClassDir(NULL), mResourceIntermediatesDir(NULL), mManifestMinSdkVersion(NULL),
           mMinSdkVersion(NULL), mTargetSdkVersion(NULL), mMaxSdkVersion(NULL),
@@ -146,6 +146,8 @@
     void setCrunchedOutputDir(const char* dir) { mCrunchedOutputDir = dir; }
     const char* getProguardFile() const { return mProguardFile; }
     void setProguardFile(const char* file) { mProguardFile = file; }
+    const char* getMainDexProguardFile() const { return mMainDexProguardFile; }
+    void setMainDexProguardFile(const char* file) { mMainDexProguardFile = file; }
     const android::Vector<const char*>& getResourceSourceDirs() const { return mResourceSourceDirs; }
     void addResourceSourceDir(const char* dir) { mResourceSourceDirs.insertAt(dir,0); }
     const char* getAndroidManifestFile() const { return mAndroidManifestFile; }
@@ -299,6 +301,7 @@
     bool        mNoVersionVectors;
     const char* mCrunchedOutputDir;
     const char* mProguardFile;
+    const char* mMainDexProguardFile;
     const char* mAndroidManifestFile;
     const char* mPublicOutputFile;
     const char* mRClassDir;