e3q: config.fs: Add vendor_secdir

This resolves an issue where the camera service couldn't write to
/sys/power/wake_lock

Change-Id: I826e60ca996888a603a22dd0fcedd921d28897cb

vendor.prop

@@ -64,7 +64,7 @@ vendor.audio.flac.sw.decoder.24bit=true
 vendor.audio.hal.boot.timeout.ms=20000
 vendor.audio.hal.output.suspend.supported=true
 vendor.audio.hw.aac.encoder=false
-vendor.audio.offload.buffer.size.kb=32
+vendor.audio.offload.buffer.size.kb=256
 vendor.audio.offload.gapless.enabled=true
 vendor.audio.offload.multiaac.enable=true
 vendor.audio.offload.multiple.enabled=false