Add comments to the remaining unimplemented API entry points to prevent automerge from janking code to the wrong place.
Add comments to the remaining unimplemented API entry points to prevent automerge from janking code to the wrong place.

TRAC #23399

Signed-off-by: Geoff Lang
Signed-off-by: Shannon Woods
Authored-by: Jamie Madill

android-ia/platform_external_chromium_org_third_party_angle,android-ia/platform_external_chromium_org_third_party_angle,MIPS/external-chromium_org-third_party-angle,mlfarrell/angle,nandhanurrevanth/angle,ppy/angle,vvuk/angle,mlfarrell/angle,mikolalysenko/angle,MSOpenTech/angle,crezefire/angle,jgcaaprom/android_external_chromium_org_third_party_angle,ghostoy/angle,crezefire/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,csa7mdm/angle,larsbergstrom/angle,MSOpenTech/angle,crezefire/angle,jgcaaprom/android_external_chromium_org_third_party_angle,xin3liang/platform_external_chromium_org_third_party_angle,nandhanurrevanth/angle,larsbergstrom/angle,MSOpenTech/angle,xin3liang/platform_external_chromium_org_third_party_angle,ghostoy/angle,ecoal95/angle,bsergean/angle,bsergean/angle,ecoal95/angle,larsbergstrom/angle,domokit/waterfall,geekboxzone/lollipop_external_chromium_org_third_party_angle,jgcaaprom/android_external_chromium_org_third_party_angle,android-ia/platform_external_chromium_org_third_party_angle,mybios/angle,nandhanurrevanth/angle,vvuk/angle,ppy/angle,bsergean/angle,mybios/angle,mybios/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,ghostoy/angle,mrobinson/rust-angle,ppy/angle,xin3liang/platform_external_chromium_org_third_party_angle,crezefire/angle,mrobinson/rust-angle,ecoal95/angle,MSOpenTech/angle,domokit/waterfall,bsergean/angle,xin3liang/platform_external_chromium_org_third_party_angle,vvuk/angle,mlfarrell/angle,vvuk/angle,jgcaaprom/android_external_chromium_org_third_party_angle,mrobinson/rust-angle,mikolalysenko/angle,ecoal95/angle,larsbergstrom/angle,android-ia/platform_external_chromium_org_third_party_angle,mlfarrell/angle,nandhanurrevanth/angle,MIPS/external-chromium_org-third_party-angle,csa7mdm/angle,mikolalysenko/angle,mrobinson/rust-angle,ghostoy/angle,ecoal95/angle,ppy/angle,geekboxzone/lollipop_external_chromium_org_third_party_angle,mybios/angle,csa7mdm/angle,MIPS/external-chromium_org-third_party-angle,mikolalysenko/angle,mrobinson/rust-angle,csa7mdm/angle,MIPS/external-chromium_org-third_party-angle