Update ANGLE Developer Options

Update ANGLE developer options to allow selecting the OpenGL driver
(default, ANGLE, native) for each app as well as forcing ANGLE for all
apps.

Bug: 118384925
Test: Verify the default/ANGLE/native values are saved and applied and
used by the loader.

Change-Id: I389e2b7da171af28efb33b99f437003318ed4ec9
diff --git a/libs/graphicsenv/include/graphicsenv/GraphicsEnv.h b/libs/graphicsenv/include/graphicsenv/GraphicsEnv.h
index 20e4d66..4ec53f1 100644
--- a/libs/graphicsenv/include/graphicsenv/GraphicsEnv.h
+++ b/libs/graphicsenv/include/graphicsenv/GraphicsEnv.h
@@ -44,12 +44,12 @@
     // (libraries must be stored uncompressed and page aligned); such elements
     // in the search path must have a '!' after the zip filename, e.g.
     //     /system/app/ANGLEPrebuilt/ANGLEPrebuilt.apk!/lib/arm64-v8a
-    void setAngleInfo(const std::string path, const std::string appName, bool devOptIn,
+    void setAngleInfo(const std::string path, const std::string appName, std::string devOptIn,
                       const int rulesFd, const long rulesOffset, const long rulesLength);
     android_namespace_t* getAngleNamespace();
     const char* getAngleAppName();
     const char* getAngleAppPref();
-    bool getAngleDeveloperOptIn();
+    const char* getAngleDeveloperOptIn();
     int getAngleRulesFd();
     long getAngleRulesOffset();
     long getAngleRulesLength();
@@ -69,7 +69,7 @@
     std::string mDriverPath;
     std::string mAnglePath;
     std::string mAngleAppName;
-    bool mAngleDeveloperOptIn;
+    std::string mAngleDeveloperOptIn;
     int mAngleRulesFd;
     long mAngleRulesOffset;
     long mAngleRulesLength;