VmTerminalApp: Fix string

Wi-Fi is normally unmetered (i.e. doesn't pay for traffic),
so the wording is totally wrong.
Just used Wi-Fi as other apps are doing.

Bug: N/A
Change-Id: I2a51fb20525e06c42f025e1e759a544683fc2436
Test: Manually
diff --git a/android/TerminalApp/res/values/strings.xml b/android/TerminalApp/res/values/strings.xml
index f8350a0..070807c 100644
--- a/android/TerminalApp/res/values/strings.xml
+++ b/android/TerminalApp/res/values/strings.xml
@@ -24,8 +24,8 @@
     <string name="installer_title_text">Install Linux terminal</string>
     <!-- Installer activity description format [CHAR LIMIT=none] -->
     <string name="installer_desc_text_format">To launch Linux terminal, you need to download roughly <xliff:g id="expected_size" example="350GB">%1$s</xliff:g> of data over network.\nWould you proceed?</string>
-    <!-- Checkbox at the installer activity to wait for Wi-Fi on metered network to prevent from paying network traffic [CHAR LIMIT=none] -->
-    <string name="installer_wait_for_wifi_checkbox_text">Wait for Wi-Fi on metered network</string>
+    <!-- Checkbox at the installer activity to download when Wi-Fi is available to prevent from paying network traffic [CHAR LIMIT=none] -->
+    <string name="installer_wait_for_wifi_checkbox_text">Download when Wi-Fi is available</string>
     <!-- Button at the installer activity to confirm installation [CHAR LIMIT=16] -->
     <string name="installer_install_button_enabled_text">Install</string>
     <!-- Button at the installer activity to when installation is already in progress [CHAR LIMIT=16] -->