convert OUString 0==compareToAscii to equalsAscii

Convert code like:
   0 == aStr.compareToAscii("XXX")
to
   aStr.equalsAscii("XXX")
which is both clearer and faster.

Change-Id: I2e906d7d38494db38eb292702fadb781b1251e07
convert OUString !compareToAscii to equalsAscii

Convert code like
   if( ! aStr.compareToAscii("XXX") )
to
   if( aStr.equalsAscii("XXX") )
which is both clearer and faster.

Change-Id: I267511bccab52f5225b291acbfa4e388b5a5302b
convert OUString compareToAscii == 0 to equalsAscii

Convert code like
   aStr.compareToAscii("XXX") == 0
to
  aStr.equalsAscii("XXX")
which is both easier to read and faster.

Change-Id: I448abf58f2fa0e7715dba53f8e8825ca0587c83f