Android: Set up style also when using QtEmbeddedLoader

Embedded loader was missing style set up, leading to a crash
when platform theme style data was loaded. As a drive by, change
the style set up to use Context instead of Activity, since it doesn't
require Activity.

Fixes: QTBUG-119532
Pick-to: 6.7
Change-Id: I434233e173cc2c90d981bbf2aa0044117a20b17f
Reviewed-by: Assam Boudjelthia <assam.boudjelthia@qt.io>

src/android/jar/src/org/qtproject/qt/android/ExtractStyle.java

@@ -149,9 +149,9 @@ private static boolean isUiModeDark(Configuration config)
         return (config.uiMode & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES;
     }
 
-    public static String setup(Activity activity, String extractOption, int dpi) {
+    public static String setup(Context context, String extractOption, int dpi) {
 
-        String dataDir = activity.getApplicationInfo().dataDir;
+        String dataDir = context.getApplicationInfo().dataDir;
         m_stylePath = dataDir + "/qt-reserved-files/android-style/" + dpi + "/";
 
         if (extractOption.isEmpty())
@@ -168,7 +168,7 @@ public static String setup(Activity activity, String extractOption, int dpi) {
         // SDK version >= 28 when the target SDK version is set to something lower then 28,
         // so default to "none" and issue a warning if that is the case.
         if (extractOption.equals("default")) {
-            int targetSdk = activity.getApplicationInfo().targetSdkVersion;
+            int targetSdk = context.getApplicationInfo().targetSdkVersion;
             if (targetSdk < 28 && Build.VERSION.SDK_INT >= 28) {
                 Log.e(QtTAG, "extract_android_style option set to \"none\" when " +
                         "targetSdkVersion is less then 28");
@@ -181,7 +181,7 @@ public static String setup(Activity activity, String extractOption, int dpi) {
         m_missingNormalStyle = !(new File(m_stylePath + "style.json").exists());
         m_extractMinimal = extractOption.equals("minimal");
 
-        ExtractStyle.runIfNeeded(activity, isUiModeDark(activity.getResources().getConfiguration()));
+        ExtractStyle.runIfNeeded(context, isUiModeDark(context.getResources().getConfiguration()));
 
         return m_stylePath;
     }

src/android/jar/src/org/qtproject/qt/android/QtEmbeddedLoader.java

@@ -37,6 +37,10 @@ class QtEmbeddedLoader extends QtLoader {
     public QtEmbeddedLoader(Context context) {
         super(new ContextWrapper(context));
         // TODO Service context handling QTBUG-118874
+        int displayDensity = m_context.getResources().getDisplayMetrics().densityDpi;
+        setEnvironmentVariable("QT_ANDROID_THEME_DISPLAY_DPI", String.valueOf(displayDensity));
+        String stylePath = ExtractStyle.setup(m_context, "minimal", displayDensity);
+        setEnvironmentVariable("ANDROID_STYLE_PATH", stylePath);
     }
 
     @Override