[CEC Configuration] Load master XML into system/etc directory instead of product/etc

Bug: 168020131
Bug: 174349652
Test: smoke tested an ATV device
Change-Id: If6a04c188defb54736fcfe151345652453869742
diff --git a/data/etc/cec_config.xml b/data/etc/cec_config.xml
deleted file mode 100644
index 480e0ec..0000000
--- a/data/etc/cec_config.xml
+++ /dev/null
@@ -1,49 +0,0 @@
-<?xml version='1.0' encoding='utf-8' standalone='yes' ?>
-<cec-settings>
-  <setting name="hdmi_cec_enabled"
-           value-type="int"
-           user-configurable="true">
-    <allowed-values>
-      <value int-value="0" />
-      <value int-value="1" />
-    </allowed-values>
-    <default-value int-value="1" />
-  </setting>
-  <setting name="hdmi_cec_version"
-           value-type="int"
-           user-configurable="true">
-    <allowed-values>
-      <value int-value="0x05" />
-      <value int-value="0x06" />
-    </allowed-values>
-    <default-value int-value="0x05" />
-  </setting>
-  <setting name="send_standby_on_sleep"
-           value-type="string"
-           user-configurable="true">
-    <allowed-values>
-      <value string-value="to_tv" />
-      <value string-value="broadcast" />
-      <value string-value="none" />
-    </allowed-values>
-    <default-value string-value="to_tv" />
-  </setting>
-  <setting name="power_state_change_on_active_source_lost"
-           value-type="string"
-           user-configurable="true">
-    <allowed-values>
-      <value string-value="none" />
-      <value string-value="standby_now" />
-    </allowed-values>
-    <default-value string-value="none" />
-  </setting>
-  <setting name="system_audio_mode_muting"
-           value-type="int"
-           user-configurable="true">
-    <allowed-values>
-      <value int-value="0" />
-      <value int-value="1" />
-    </allowed-values>
-    <default-value int-value="1" />
-  </setting>
-</cec-settings>