Allow more information in bitmap ashmem filenames

Bug: 369619160
Flag: com.android.graphics.hwui.flags.bitmap_ashmem_long_name

This CL allows more information in bitmap ashmem filenames, e.g.

$ adb shell lsof | grep 'ashmem.*bitmap'
system_server    1505   system  mem  unknown  /dev/ashmem/bitmap/writeblob-id_173400011-472x472-size_891136-com.google.android.googlequicksearchbox:search (deleted)
system_server    1505   system  mem  unknown  /dev/ashmem/bitmap/allocate-id_273400014-126x126-size_63504-com.google.android.googlequicksearchbox:search (deleted)
system_server    1505   system  mem  unknown  /dev/ashmem/bitmap/allocate-id_247000010-50x63-size_12600-com.android.phone (deleted)
ndroid.systemui  2155  u0_a238  mem  unknown  /dev/ashmem/bitmap/writeblob-id_173400011-472x472-size_891136-com.google.android.googlequicksearchbox:search (deleted)
ndroid.systemui  2155  u0_a238  mem  unknown  /dev/ashmem/bitmap/allocate-id_214800058-192x192-size_147456-com.google.android.as (deleted)

The long filename will tell us:

  * callsite - where the ashmem bitmap is created, `allocate` means
    in Bitmap::allocateAshmemBitmap where an ashmem backed bitmap is
    directly allocated, or `writeblob` in writeBlob() where existing
    bitmap is turned to an ashmem backed one
  * id - unique to the bitmap, this can also be used to associated to
    the bitmap in a heapdump with the same `mId` field
  * dimension - width x height
  * size - size of the bitmap in bytes
  * origin - the process where the bitmap was created

Change-Id: I7bbb7003d0a0abe62e2008bd708760b6f4e2f8b6