Revert "Find7: do not inherit from EOS vendor for now"

This reverts commit c6bf83fd82e934da7cd0b49822ff4c88bdc1ef54.
Find7: switch to standard platform power HAL
temp: disable selinux context mount
Revert "Find7: enable legacy skia defines for our current display HAL"

This reverts commit 7b0f01a415f0f852e86711ea378696f1a14353bf.
Find7: switch to standard qcom display HAL
Find7: enable legacy heap mask usage