citra_android: Bundle speex by default (#6348)

Without this, builds will fail on linux

src/android/app/build.gradle

@@ -107,7 +107,8 @@ android {
                 arguments "-DENABLE_QT=0", // Don't use QT
                         "-DENABLE_SDL2=0", // Don't use SDL
                         "-DENABLE_WEB_SERVICE=0", // Don't use telemetry
-                        "-DANDROID_ARM_NEON=true" // cryptopp requires Neon to work
+                        "-DANDROID_ARM_NEON=true", // cryptopp requires Neon to work
+                        "-DBUNDLE_SPEEX=ON"
 
                 abiFilters abiFilter
             }