Removed android.software.backup from automotive.

Reason: the Backup service doesn't support secondary users.

Test: adb shell pm list features | grep backup || echo NOT_FOUND
Test: atest CtsBackupHostTestCases

Fixes: 166339795
Bug: 169277194

Change-Id: I9bf370ac7364725c540e0b9c3acf2d597ea6ab5a
diff --git a/common/car_core_hardware.xml b/common/car_core_hardware.xml
index 0656e49..e027149 100644
--- a/common/car_core_hardware.xml
+++ b/common/car_core_hardware.xml
@@ -43,7 +43,6 @@
     <!-- basic system services -->
     <feature name="android.software.connectionservice" />
     <feature name="android.software.voice_recognizers" notLowRam="true" />
-    <feature name="android.software.backup" />
     <feature name="android.software.home_screen" />
     <feature name="android.software.cant_save_state" />
     <feature name="android.software.input_methods" />