Allow vendor-init-settable to ro.enable_boot_charger_mode

vendor-init-settable should be allowed to ro.enable_boot_charger_mode so
that SoC vendors can set its default value.

Bug: 74421250
Test: succeeded building and tested with taimen
Change-Id: I2859aab29fefb7882989413a089b0de55142d2f1

public/property_contexts

@@ -90,6 +90,7 @@ ro.control_privapp_permissions u:object_r:exported3_default_prop:s0 exact string
 ro.cp_system_other_odex u:object_r:exported3_default_prop:s0 exact int
 ro.crypto.scrypt_params u:object_r:exported2_vold_prop:s0 exact string
 ro.dalvik.vm.native.bridge u:object_r:exported_dalvik_prop:s0 exact string
+ro.enable_boot_charger_mode u:object_r:exported3_default_prop:s0 exact bool
 ro.gfx.driver.0 u:object_r:exported3_default_prop:s0 exact string
 ro.oem_unlock_supported u:object_r:exported3_default_prop:s0 exact int
 ro.opengles.version u:object_r:exported3_default_prop:s0 exact int