gn args: cleans up the gn args for v148

android_channel="stable"

blink_symbol_level=1

build_contextual_search=false

build_with_tflite_lib=false

chrome_pgo_phase=0

dcheck_always_on=false

disable_fieldtrial_testing_config=true

symbol_level=1

treat_warnings_as_errors=true

use_debug_fission=true

use_errorprone_java_compiler=false

use_official_google_api_keys=false

use_rtti=false

enable_arcore=false

  chrome_pgo_phase = 2 # enable pgo

  use_errorprone_java_compiler = false

  # do not split Developer UI split into a separate Dynamic Feature Module

  dfmify_dev_ui = false