Adds using/sending FB Facial & Eye tracking to VRCFT by @AeroScripts &

@dfgHiatus

alxr-engine submodule update:
    * Adds support for using/sending FB Facial & Eye tracking to VRCFT by @AeroScripts & @dfgHiatus
    * Wrap code in preprocessor conditionals to be used only by supported builds/platforms.
     * Fix crashes when running on Quest 1/
* Enable AndroidManifest.xml entries for Facial/Eye tracking.

alvr/openxr-client/alxr-android-client/quest/Cargo.toml

@@ -181,14 +181,14 @@ name = "com.oculus.feature.PASSTHROUGH"
 required = true
 
 # <uses-feature android:name="oculus.software.eye_tracking" android:required="true" />
-# [[package.metadata.android.uses_feature]]
-# name = "oculus.software.eye_tracking"
-# required = true
+[[package.metadata.android.uses_feature]]
+name = "oculus.software.eye_tracking"
+required = true
 
 # <uses-feature android:name="oculus.software.face_tracking" android:required="true" />
-# [[package.metadata.android.uses_feature]]
-# name = "oculus.software.face_tracking"
-# required = true
+[[package.metadata.android.uses_feature]]
+name = "oculus.software.face_tracking"
+required = true
 
 # <uses-feature android:name="android.software.vr.mode" android:required="false"/>
 # <uses-feature android:name="android.hardware.vr.high_performance" android:required="false"/>
@@ -251,11 +251,11 @@ name = "com.oculus.permission.WIFI_LOCK"
 name = "com.oculus.permission.HAND_TRACKING"
 
 # <uses-permission android:name="com.oculus.permission.EYE_TRACKING" />
-# [[package.metadata.android.uses_permission]]
-# name = "com.oculus.permission.EYE_TRACKING"
+[[package.metadata.android.uses_permission]]
+name = "com.oculus.permission.EYE_TRACKING"
 # <uses-permission android:name="com.oculus.permission.FACE_TRACKING" />
-# [[package.metadata.android.uses_permission]]
-# name = "com.oculus.permission.FACE_TRACKING"
+[[package.metadata.android.uses_permission]]
+name = "com.oculus.permission.FACE_TRACKING"
 
 # [[package.metadata.android.uses_permission]]
 # name = "org.khronos.openxr.permission.OPENXR"