[MTCD Android Head Units General] scorillo_ro:
It seems it has nothing to do with the USB camera access. Looking in the logs I saw:

I/ActivityManager( 595): START u0 {cmp=com.dailyroads.v/com.dailyroads.activities.FilesList} from uid 10010 on display 0
W/FlurryAgent(20608): Start session with context: com.dailyroads.v.Files@5f04a0b count:0
W/WindowManager( 595): Token{8a04c9a ActivityRecord{1513d45 u0 com.dailyroads.v/com.dailyroads.activities.FilesList t1833}} failed creating starting window
W/WindowManager( 595): android.view.InflateException: Binary XML file line #5: Failed to resolve attribute at index 6: TypedValue{t=0x0/d=0x0}
W/WindowManager( 595): at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
W/WindowManager( 595): at de.robv.android.xposed.XposedBridge.invokeOriginalMethodNative(Native Method)
W/WindowManager( 595): at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:334)
W/WindowManager( 595): at android.view.LayoutInflater.inflate(<Xposed>)
W/WindowManager( 595): at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
W/WindowManager( 595): at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
W/WindowManager( 595): at com.android.internal.policy.PhoneWindow.generateLayout(PhoneWindow.java:3937)
W/WindowManager( 595): at com.android.internal.policy.PhoneWindow.installDecor(PhoneWindow.java:4009)
W/WindowManager( 595): at com.android.internal.policy.PhoneWindow.getDecorView(PhoneWindow.java:1997)
W/WindowManager( 595): at com.android.server.policy.PhoneWindowManager.addStartingWindow(PhoneWindowManager.java:2422)
W/WindowManager( 595): at com.android.server.wm.WindowManagerService$H.handleMessage(WindowManagerService.java:8053)
W/WindowManager( 595): at android.os.Handler.dispatchMessage(Handler.java:102)
W/WindowManager( 595): at android.os.Looper.loop(Looper.java:148)
W/WindowManager( 595): at android.os.HandlerThread.run(HandlerThread.java:61)
W/WindowManager( 595): at com.android.server.ServiceThread.run(ServiceThread.java:46)
W/WindowManager( 595): Caused by: java.lang.UnsupportedOperationException: Failed to resolve attribute at index 6: TypedValue{t=0x0/d=0x0}
W/WindowManager( 595): at android.content.res.TypedArray.getLayoutDimension(TypedArray.java:705)
W/WindowManager( 595): at android.content.res.XResources$XTypedArray.getLayoutDimension(XResources.java:1444)
W/WindowManager( 595): at android.view.ViewGroup$LayoutParams.setBaseAttributes(ViewGroup.java:6890)
W/WindowManager( 595): at android.view.ViewGroup$MarginLayoutParams.<init>(ViewGroup.java:7071)
W/WindowManager( 595): at android.widget.LinearLayout$LayoutParams.<init>(LinearLayout.java:1911)
W/WindowManager( 595): at android.widget.LinearLayout.generateLayoutParams(LinearLayout.java:1816)
W/WindowManager( 595): at android.widget.LinearLayout.generateLayoutParams(LinearLayout.java:1815)
W/WindowManager( 595): at android.view.LayoutInflater.rInflate(LayoutInflater.java:837)
W/WindowManager( 595): at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:798)
W/WindowManager( 595): at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
W/WindowManager( 595): ... 14 more

I already emailed them. Let's hope they'll get it fixed soon.