add Yin Yang Theme (#5508)

* add Yin Yang Theme

* change download badge color to yin yang as well

* update string

* fix &

(cherry picked from commit d9ea621e54)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceValues.kt
#	app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseThemedActivity.kt

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceValues.kt

@@ -28,7 +28,11 @@ object PreferenceValues {
         MIDNIGHT_DUSK(R.string.theme_midnightdusk),
         STRAWBERRY_DAIQUIRI(R.string.theme_strawberrydaiquiri),
         YOTSUBA(R.string.theme_yotsuba),
+        YINYANG(R.string.theme_yinyang),
+
+        // SY -->
         PURE_RED(R.string.theme_pure_red),
+        // SY <--
 
         // Deprecated
         DARK_BLUE(null),

app/src/main/java/eu/kanade/tachiyomi/ui/base/activity/BaseThemedActivity.kt

@@ -56,6 +56,9 @@ abstract class BaseThemedActivity : AppCompatActivity() {
                 PreferenceValues.AppTheme.YOTSUBA -> {
                     resIds += R.style.Theme_Tachiyomi_Yotsuba
                 }
+                PreferenceValues.AppTheme.YINYANG -> {
+                    resIds += R.style.Theme_Tachiyomi_YinYang
+                }
                 PreferenceValues.AppTheme.PURE_RED -> {
                     resIds += R.style.Theme_Tachiyomi_PureRed
                 }