display: Disable unsupported copybit features

Change-Id: I2eea2c725e4e0a195b0b4842fe52bf08e3e4e713
gralloc: Remove usage of METADATA_SET ioctl

 * No longer needed to configure base layer alpha

Change-Id: I21ae663c530da9c848a3605a9f16bedbeea1502e
Revert "libhwcomposer: Don't count video layers marked for SKIP"

 * Causing a memory leak during orientation change.

This reverts commit 357f747b7e4b7206230aa540e3c916258012dfb7.